{"title":"Hair, Skin \u0026 Nails Blood Test Home Kits UK","description":"\u003cmeta charset=\"utf-8\"\u003e\u003cmeta name=\"viewport\" content=\"width=device-width,initial-scale=1,viewport-fit=cover\"\u003e\u003ctitle\u003eHair, Skin \u0026amp; Nails Blood Test Home Kits UK\u003c\/title\u003e\u003cmeta name=\"description\" content=\"Compare private hair, skin and nails blood test home kits in the UK, including iron, ferritin, thyroid, vitamin D, B12, folate and nutrition testing.\"\u003e\u003cmeta property=\"og:type\" content=\"website\"\u003e\u003cmeta property=\"og:title\" content=\"Hair, Skin \u0026amp; Nails Blood Test Home Kits UK\"\u003e\u003cmeta property=\"og:description\" content=\"Compare private iron, thyroid and vitamin blood test home kits for hair, skin and nail concerns with laboratory analysis and clear guidance.\"\u003e\u003cmeta property=\"og:image\" 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*{scroll-behavior:auto!important}}\n\u003c\/style\u003e\u003carticle class=\"hsn\"\u003e\u003csection class=\"hsn_hero\"\u003e\u003cp class=\"hsn_eyebrow\"\u003ePrivate nutrient, iron and thyroid testing at home\u003c\/p\u003e\n\u003ch1\u003eHair, Skin \u0026amp; Nails Blood Test Home Kits UK\u003c\/h1\u003e\n\u003cdiv class=\"hsn_reviewed\"\u003e\n\u003cspan\u003eMedically checked\u003c\/span\u003e\u003cstrong\u003eReviewed by the Grace Belgravia Medical Expert Board\u003c\/strong\u003e\u003csmall\u003eLast reviewed 28 July 2026\u003c\/small\u003e\n\u003c\/div\u003e\n\u003cp class=\"hsn_lead\"\u003e\u003cstrong\u003eCompare private iron, thyroid and vitamin blood test home kits when hair shedding, brittle nails, dry skin or wider nutritional concerns prompt you to look for laboratory context.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHair, skin and nail changes are often non-specific. They may relate to iron deficiency, thyroid dysfunction, nutritional status, hormones, stress, illness, medicines, dermatological conditions or normal life-stage changes. Blood testing can help investigate selected causes, but it cannot diagnose every scalp, skin or nail condition.\u003c\/p\u003e\n\u003cdiv class=\"hsn_actions\"\u003e\n\u003ca class=\"hsn_btn hsn_btn_primary\" href=\"#choose\"\u003eChoose a suitable test\u003c\/a\u003e\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"#compare\"\u003eCompare all six tests\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_stats\"\u003e\n\u003cdiv class=\"hsn_stat\"\u003e\n\u003cstrong\u003e6 relevant home kits\u003c\/strong\u003e\u003cspan\u003eFocused iron, thyroid and vitamin testing routes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_stat\"\u003e\n\u003cstrong\u003eSymptom-led guidance\u003c\/strong\u003e\u003cspan\u003eHair shedding, brittle nails, dry skin and nutritional concerns\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_stat\"\u003e\n\u003cstrong\u003eLaboratory analysis\u003c\/strong\u003e\u003cspan\u003ePrivate home collection with secure reporting\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_stat\"\u003e\n\u003cstrong\u003eClear limitations\u003c\/strong\u003e\u003cspan\u003eBlood results do not diagnose every dermatological cause\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"hsn_banner\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/lifestyle_8.png?v=1785178434\" alt=\"Person reviewing hair skin and nails blood test home kits\" width=\"1600\" height=\"720\" loading=\"eager\"\u003e\u003cfigcaption\u003e\u003cspan class=\"hsn_eyebrow\"\u003eChoose by possible cause\u003c\/span\u003e\u003cstrong\u003eIron, thyroid or a broader nutritional panel?\u003c\/strong\u003e\u003cspan\u003eStart with the pattern of symptoms and the biomarkers that may change the next step.\u003c\/span\u003e\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cdiv class=\"hsn_warning\"\u003e\n\u003cstrong\u003eSudden, patchy, scarring or inflamed hair loss needs clinical assessment.\u003c\/strong\u003e\u003cp\u003eSeek prompt medical advice for rapidly increasing hair loss, scalp pain or scarring, new neurological symptoms, severe fatigue, breathlessness, heavy bleeding, unexplained weight loss or a significant change in general health.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003cnav class=\"hsn_nav\" aria-label=\"Collection navigation\"\u003e\u003ca href=\"#choose\"\u003eTest finder\u003c\/a\u003e\u003ca href=\"#symptoms\"\u003eSymptoms\u003c\/a\u003e\u003ca href=\"#tests\"\u003eAll tests\u003c\/a\u003e\u003ca href=\"#compare\"\u003eCompare\u003c\/a\u003e\u003ca href=\"#markers\"\u003eBiomarkers\u003c\/a\u003e\u003ca href=\"#preparation\"\u003ePreparation\u003c\/a\u003e\u003ca href=\"#medical-review\"\u003eMedical review\u003c\/a\u003e\u003ca href=\"#faqs\"\u003eFAQs\u003c\/a\u003e\u003c\/nav\u003e\u003csection class=\"hsn_section\" id=\"choose\"\u003e\u003cdiv class=\"hsn_finder\"\u003e\n\u003cp class=\"hsn_eyebrow\"\u003eInteractive test finder\u003c\/p\u003e\n\u003ch2\u003eWhat would you like to investigate?\u003c\/h2\u003e\n\u003cp\u003eSelect the closest concern. This tool helps with product navigation only and does not diagnose hair loss, skin disease or nail disorders.\u003c\/p\u003e\n\u003cdiv class=\"hsn_choices\" role=\"group\" aria-label=\"Choose a hair skin and nails testing goal\"\u003e\n\u003cbutton class=\"hsn_choice\" type=\"button\" data-result=\"iron\" aria-pressed=\"false\"\u003eHair shedding with possible low iron\u003c\/button\u003e\u003cbutton class=\"hsn_choice\" type=\"button\" data-result=\"thyroid\" aria-pressed=\"false\"\u003eDry skin, hair or nail changes with thyroid concerns\u003c\/button\u003e\u003cbutton class=\"hsn_choice\" type=\"button\" data-result=\"vitamins\" aria-pressed=\"false\"\u003eB12, folate and vitamin D\u003c\/button\u003e\u003cbutton class=\"hsn_choice\" type=\"button\" data-result=\"broad\" aria-pressed=\"false\"\u003eA broader vitamin and mineral overview\u003c\/button\u003e\u003cbutton class=\"hsn_choice\" type=\"button\" data-result=\"vitd\" aria-pressed=\"false\"\u003eVitamin D only\u003c\/button\u003e\u003cbutton class=\"hsn_choice\" type=\"button\" data-result=\"clinical\" aria-pressed=\"false\"\u003eSudden, patchy or severe symptoms\u003c\/button\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_result\" id=\"hsn-result\" aria-live=\"polite\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"hsn_section\" id=\"symptoms\"\u003e\u003cp class=\"hsn_eyebrow\"\u003eSymptoms and patterns\u003c\/p\u003e\n\u003ch2\u003eWhen blood testing may add useful context\u003c\/h2\u003e\n\u003cdiv class=\"hsn_grid3\"\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eDiffuse hair shedding\u003c\/strong\u003e\u003cspan\u003eIron deficiency and thyroid conditions are among the causes sometimes investigated, particularly when shedding follows illness, stress, weight change or childbirth.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eBrittle, ridged or changing nails\u003c\/strong\u003e\u003cspan\u003eNail changes can reflect trauma, fungal or inflammatory disease, iron status, thyroid function or other causes.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eDry skin and hair\u003c\/strong\u003e\u003cspan\u003eCan occur with thyroid dysfunction, environmental exposure, eczema, medicines and many non-nutritional factors.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eRestricted diet or low intake\u003c\/strong\u003e\u003cspan\u003eMay increase the relevance of B12, folate, iron or vitamin D depending on food choices and supplementation.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eHeavy periods or blood loss\u003c\/strong\u003e\u003cspan\u003eCan increase the likelihood of depleted iron stores and requires attention to the cause as well as the blood result.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eHormonal or life-stage change\u003c\/strong\u003e\u003cspan\u003ePregnancy, postpartum changes, menopause and androgen-related hair loss may need a more specific clinical or hormone pathway.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_notice\"\u003e\n\u003cstrong\u003eVisible changes do not identify the cause by themselves.\u003c\/strong\u003e\u003cp\u003eThe British Association of Dermatologists notes that blood tests may be used to exclude causes such as thyroid conditions and iron deficiency in diffuse shedding, while examination of the scalp and hair pattern remains important.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"hsn_section\"\u003e\u003cp class=\"hsn_eyebrow\"\u003eThe Grace Belgravia experience\u003c\/p\u003e\n\u003ch2\u003ePrivate testing with dermatological boundaries clearly explained\u003c\/h2\u003e\n\u003cdiv class=\"hsn_gallery\"\u003e\n\u003cfigure\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/lifestyle_2.png?v=1785178433\" alt=\"Person reading hair skin and nails blood test information at home\" width=\"1200\" height=\"675\" loading=\"lazy\"\u003e\u003cfigcaption\u003e\u003cspan class=\"hsn_eyebrow\"\u003eTarget the likely pathway\u003c\/span\u003e\u003cstrong\u003eChoose biomarkers, not beauty promises\u003c\/strong\u003e\u003cp\u003eA blood test is most useful when it answers a defined nutritional, iron or thyroid question.\u003c\/p\u003e\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cfigure\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/lifestyle_5.png?v=1785178432\" alt=\"Private hair skin and nails test kit in a refined home setting\" width=\"1200\" height=\"675\" loading=\"lazy\"\u003e\u003cfigcaption\u003e\u003cspan class=\"hsn_eyebrow\"\u003eUse results responsibly\u003c\/span\u003e\u003cstrong\u003eDo not self-prescribe high-dose supplements\u003c\/strong\u003e\u003cp\u003eIron, vitamin D and other supplements can cause harm when the dose or diagnosis is wrong.\u003c\/p\u003e\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"hsn_section\" id=\"tests\"\u003e\u003cp class=\"hsn_eyebrow\"\u003eBrowse the collection\u003c\/p\u003e\n\u003ch2\u003eHair, skin and nails blood test home kits\u003c\/h2\u003e\n\u003cdiv class=\"hsn_products\"\u003e\n\u003carticle class=\"hsn_product\"\u003e\u003ca class=\"hsn_product_media\" href=\"\/products\/blood-iron-test\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Iron_Blood_Test_UK_-_Ferritin_Iron_Profile.png?v=1785153771\" alt=\"Home Iron Blood Test UK – Ferritin and Iron Profile\" width=\"900\" height=\"680\" loading=\"lazy\"\u003e\u003c\/a\u003e\u003cdiv class=\"hsn_product_body\"\u003e\n\u003cspan class=\"hsn_tag\"\u003eIron stores and transport\u003c\/span\u003e\u003ch3\u003e\u003ca href=\"\/products\/blood-iron-test\"\u003eHome Iron Blood Test UK – Ferritin \u0026amp; Iron Profile\u003c\/a\u003e\u003c\/h3\u003e\n\u003cp\u003eA focused route for people seeking ferritin and iron-profile context. Iron deficiency can contribute to diffuse hair shedding, fatigue and pallor, but the cause of low iron still requires assessment.\u003c\/p\u003e\n\u003cdiv class=\"hsn_specs\"\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eCore focus\u003c\/strong\u003e\u003cspan\u003eFerritin and the listed iron-profile measurements\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eMay suit\u003c\/strong\u003e\u003cspan\u003eDiffuse shedding, fatigue, heavy periods or restricted dietary intake\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eContext\u003c\/strong\u003e\u003cspan\u003eInflammation can increase ferritin\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eLimit\u003c\/strong\u003e\u003cspan\u003eDoes not diagnose the cause of hair loss or iron deficiency\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/blood-iron-test\"\u003eView iron profile test\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"hsn_product\"\u003e\u003ca class=\"hsn_product_media\" href=\"\/products\/thyroid-function-test\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Thyroid_Test_Kit_UK_-_TSH_T3_T4_Blood_Test.png?v=1785167812\" alt=\"Home Thyroid Test Kit UK – TSH T3 T4 Blood Test\" width=\"900\" height=\"680\" loading=\"lazy\"\u003e\u003c\/a\u003e\u003cdiv class=\"hsn_product_body\"\u003e\n\u003cspan class=\"hsn_tag\"\u003eFocused thyroid function\u003c\/span\u003e\u003ch3\u003e\u003ca href=\"\/products\/thyroid-function-test\"\u003eHome Thyroid Test Kit UK – TSH, T3 \u0026amp; T4 Blood Test\u003c\/a\u003e\u003c\/h3\u003e\n\u003cp\u003eA focused thyroid-function route when hair, skin or nail changes occur alongside symptoms such as altered energy, temperature sensitivity or weight change.\u003c\/p\u003e\n\u003cdiv class=\"hsn_specs\"\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eCore focus\u003c\/strong\u003e\u003cspan\u003eTSH and the thyroid hormones listed on the product page\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eMay suit\u003c\/strong\u003e\u003cspan\u003eA defined thyroid-function question\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eContext\u003c\/strong\u003e\u003cspan\u003eMedicines, pregnancy and biotin can affect interpretation\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eLimit\u003c\/strong\u003e\u003cspan\u003eDoes not diagnose a scalp, skin or nail disorder\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/thyroid-function-test\"\u003eView thyroid function test\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"hsn_product\"\u003e\u003ca class=\"hsn_product_media\" href=\"\/products\/advanced-thyroid-hormones\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Advanced_Thyroid_Test_Kit_UK_-_Hormones_Antibodies.png?v=1785150104\" alt=\"Home Advanced Thyroid Test Kit UK – Hormones and Antibodies\" width=\"900\" height=\"680\" loading=\"lazy\"\u003e\u003c\/a\u003e\u003cdiv class=\"hsn_product_body\"\u003e\n\u003cspan class=\"hsn_tag\"\u003eThyroid hormones and antibodies\u003c\/span\u003e\u003ch3\u003e\u003ca href=\"\/products\/advanced-thyroid-hormones\"\u003eHome Advanced Thyroid Test Kit UK – Hormones \u0026amp; Antibodies\u003c\/a\u003e\u003c\/h3\u003e\n\u003cp\u003eA broader thyroid option for people who specifically want the additional thyroid-antibody markers listed on the product page alongside thyroid-function measurements.\u003c\/p\u003e\n\u003cdiv class=\"hsn_specs\"\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eCore focus\u003c\/strong\u003e\u003cspan\u003eThyroid hormones with antibody context\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eMay suit\u003c\/strong\u003e\u003cspan\u003eA broader thyroid question where antibody information is relevant\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eContext\u003c\/strong\u003e\u003cspan\u003eAntibodies do not explain every symptom\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eLimit\u003c\/strong\u003e\u003cspan\u003eNot automatically better than focused testing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/advanced-thyroid-hormones\"\u003eView advanced thyroid test\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"hsn_product\"\u003e\u003ca class=\"hsn_product_media\" href=\"\/products\/essential-vitamins-test\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/home-vitamin-deficiency-test-kit-uk-vitamins-minerals-iron.webp?v=1785138495\" alt=\"Home Vitamin Deficiency Test UK – B12 Folate and Vitamin D\" width=\"900\" height=\"680\" loading=\"lazy\"\u003e\u003c\/a\u003e\u003cdiv class=\"hsn_product_body\"\u003e\n\u003cspan class=\"hsn_tag\"\u003eB12, folate and vitamin D\u003c\/span\u003e\u003ch3\u003e\u003ca href=\"\/products\/essential-vitamins-test\"\u003eHome Vitamin Deficiency Test UK – B12, Folate \u0026amp; Vitamin D\u003c\/a\u003e\u003c\/h3\u003e\n\u003cp\u003eA focused three-vitamin panel for people with dietary, absorption or supplement-related questions. These markers may add context but do not provide a comprehensive hair or skin diagnosis.\u003c\/p\u003e\n\u003cdiv class=\"hsn_specs\"\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eCore focus\u003c\/strong\u003e\u003cspan\u003eVitamin B12, folate and vitamin D\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eMay suit\u003c\/strong\u003e\u003cspan\u003eRestricted diet, low sun exposure or previous low results\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eContext\u003c\/strong\u003e\u003cspan\u003eSupplements can materially affect results\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eLimit\u003c\/strong\u003e\u003cspan\u003eDoes not measure every relevant nutrient\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/essential-vitamins-test\"\u003eView essential vitamins test\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"hsn_product\"\u003e\u003ca class=\"hsn_product_media\" href=\"\/products\/vitamin-d\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Vitamin_D_Test_Kit_UK_-_Vitamin_D_Blood_Test_44bd2a2e-e600-46ae-a4b9-dbbf5f1ea324.png?v=1785151119\" alt=\"Home Vitamin D Test Kit UK – Vitamin D Blood Test\" width=\"900\" height=\"680\" loading=\"lazy\"\u003e\u003c\/a\u003e\u003cdiv class=\"hsn_product_body\"\u003e\n\u003cspan class=\"hsn_tag\"\u003eFocused vitamin D status\u003c\/span\u003e\u003ch3\u003e\u003ca href=\"\/products\/vitamin-d\"\u003eHome Vitamin D Test Kit UK – Vitamin D Blood Test\u003c\/a\u003e\u003c\/h3\u003e\n\u003cp\u003eA single-marker route when vitamin D status is the defined question. Public-health supplementation advice is different from diagnosing and treating an individual deficiency.\u003c\/p\u003e\n\u003cdiv class=\"hsn_specs\"\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eCore focus\u003c\/strong\u003e\u003cspan\u003eVitamin D status\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eMay suit\u003c\/strong\u003e\u003cspan\u003eLow sun exposure, previous deficiency or clinician-advised monitoring\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eContext\u003c\/strong\u003e\u003cspan\u003eSeason and supplement use matter\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eLimit\u003c\/strong\u003e\u003cspan\u003eDoes not diagnose hair loss or skin disease\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/vitamin-d\"\u003eView vitamin D test\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"hsn_product\"\u003e\u003ca class=\"hsn_product_media\" href=\"\/products\/vitamins-minerals\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Vitamin_Deficiency_Test_Kit_UK_-_Vitamins_Minerals_Iron.png?v=1785150608\" alt=\"Home Vitamin Deficiency Test Kit UK – Vitamins Minerals and Iron\" width=\"900\" height=\"680\" loading=\"lazy\"\u003e\u003c\/a\u003e\u003cdiv class=\"hsn_product_body\"\u003e\n\u003cspan class=\"hsn_tag\"\u003eBroader nutritional overview\u003c\/span\u003e\u003ch3\u003e\u003ca href=\"\/products\/vitamins-minerals\"\u003eHome Vitamin Deficiency Test Kit UK – Vitamins, Minerals \u0026amp; Iron\u003c\/a\u003e\u003c\/h3\u003e\n\u003cp\u003eA wider nutritional panel combining the vitamins, minerals and iron-related measurements listed on the product page. Choose it because the additional markers are relevant, not simply because the panel is larger.\u003c\/p\u003e\n\u003cdiv class=\"hsn_specs\"\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eCore focus\u003c\/strong\u003e\u003cspan\u003eMulti-marker nutritional and iron context\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eMay suit\u003c\/strong\u003e\u003cspan\u003eBroader dietary or nutritional questions\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003ePreparation\u003c\/strong\u003e\u003cspan\u003eCheck every included marker and the supplied instructions\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_spec\"\u003e\n\u003cstrong\u003eLimit\u003c\/strong\u003e\u003cspan\u003eMore biomarkers can produce incidental findings\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/vitamins-minerals\"\u003eView broader nutrition test\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/article\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"hsn_section\" id=\"compare\"\u003e\u003cp class=\"hsn_eyebrow\"\u003eSide-by-side guide\u003c\/p\u003e\n\u003ch2\u003eCompare hair, skin and nails home blood tests\u003c\/h2\u003e\n\u003cdiv class=\"hsn_compare_wrap\"\u003e\u003ctable class=\"hsn_table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eTest\u003c\/th\u003e\n\u003cth\u003eMain focus\u003c\/th\u003e\n\u003cth\u003eMay be relevant when\u003c\/th\u003e\n\u003cth\u003eImportant limitation\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/blood-iron-test\"\u003e\u003cstrong\u003eFerritin \u0026amp; Iron Profile\u003c\/strong\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eIron stores and transport\u003c\/td\u003e\n\u003ctd\u003eDiffuse shedding, fatigue, heavy periods or low intake\u003c\/td\u003e\n\u003ctd\u003eFerritin can rise with inflammation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/thyroid-function-test\"\u003e\u003cstrong\u003eThyroid Function Test\u003c\/strong\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eTSH and thyroid hormones\u003c\/td\u003e\n\u003ctd\u003eHair, skin or nail changes occur with thyroid-type symptoms\u003c\/td\u003e\n\u003ctd\u003eBiotin and medicines may interfere\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/advanced-thyroid-hormones\"\u003e\u003cstrong\u003eAdvanced Thyroid Test\u003c\/strong\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eHormones and thyroid antibodies\u003c\/td\u003e\n\u003ctd\u003eAntibody context is specifically relevant\u003c\/td\u003e\n\u003ctd\u003eAntibodies do not explain every symptom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/essential-vitamins-test\"\u003e\u003cstrong\u003eEssential Vitamins\u003c\/strong\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eB12, folate and vitamin D\u003c\/td\u003e\n\u003ctd\u003eDietary, absorption or previous deficiency concerns\u003c\/td\u003e\n\u003ctd\u003eNot a complete nutritional assessment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/vitamin-d\"\u003e\u003cstrong\u003eVitamin D\u003c\/strong\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eVitamin D status\u003c\/td\u003e\n\u003ctd\u003eA single vitamin D question\u003c\/td\u003e\n\u003ctd\u003eNot a hair-loss diagnostic test\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/vitamins-minerals\"\u003e\u003cstrong\u003eVitamins, Minerals \u0026amp; Iron\u003c\/strong\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBroader nutrition panel\u003c\/td\u003e\n\u003ctd\u003eSeveral nutritional biomarkers are relevant\u003c\/td\u003e\n\u003ctd\u003eLarger panels can create incidental findings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"hsn_mobile_compare\"\u003e\n\u003carticle class=\"hsn_compare_card\"\u003e\u003ch3\u003eFerritin \u0026amp; Iron Profile\u003c\/h3\u003e\n\u003cdl\u003e\n\u003cdiv\u003e\n\u003cdt\u003eFocus\u003c\/dt\u003e\n\u003cdd\u003eIron stores and transport\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eRelevant when\u003c\/dt\u003e\n\u003cdd\u003eDiffuse shedding, fatigue, heavy periods or low intake\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eLimit\u003c\/dt\u003e\n\u003cdd\u003eFerritin can rise with inflammation\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003c\/dl\u003e\u003c\/article\u003e\u003carticle class=\"hsn_compare_card\"\u003e\u003ch3\u003eThyroid Function Test\u003c\/h3\u003e\n\u003cdl\u003e\n\u003cdiv\u003e\n\u003cdt\u003eFocus\u003c\/dt\u003e\n\u003cdd\u003eTSH and thyroid hormones\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eRelevant when\u003c\/dt\u003e\n\u003cdd\u003eChanges occur with thyroid-type symptoms\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eLimit\u003c\/dt\u003e\n\u003cdd\u003eBiotin and medicines may interfere\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003c\/dl\u003e\u003c\/article\u003e\u003carticle class=\"hsn_compare_card\"\u003e\u003ch3\u003eAdvanced Thyroid Test\u003c\/h3\u003e\n\u003cdl\u003e\n\u003cdiv\u003e\n\u003cdt\u003eFocus\u003c\/dt\u003e\n\u003cdd\u003eHormones and thyroid antibodies\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eRelevant when\u003c\/dt\u003e\n\u003cdd\u003eAntibody context is specifically required\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eLimit\u003c\/dt\u003e\n\u003cdd\u003eAntibodies do not explain every symptom\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003c\/dl\u003e\u003c\/article\u003e\u003carticle class=\"hsn_compare_card\"\u003e\u003ch3\u003eEssential Vitamins\u003c\/h3\u003e\n\u003cdl\u003e\n\u003cdiv\u003e\n\u003cdt\u003eFocus\u003c\/dt\u003e\n\u003cdd\u003eB12, folate and vitamin D\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eRelevant when\u003c\/dt\u003e\n\u003cdd\u003eDietary, absorption or previous deficiency concerns\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eLimit\u003c\/dt\u003e\n\u003cdd\u003eNot a complete nutritional assessment\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003c\/dl\u003e\u003c\/article\u003e\u003carticle class=\"hsn_compare_card\"\u003e\u003ch3\u003eVitamin D\u003c\/h3\u003e\n\u003cdl\u003e\n\u003cdiv\u003e\n\u003cdt\u003eFocus\u003c\/dt\u003e\n\u003cdd\u003eVitamin D status\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eRelevant when\u003c\/dt\u003e\n\u003cdd\u003eVitamin D is the specific question\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eLimit\u003c\/dt\u003e\n\u003cdd\u003eNot a hair-loss diagnostic test\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003c\/dl\u003e\u003c\/article\u003e\u003carticle class=\"hsn_compare_card\"\u003e\u003ch3\u003eVitamins, Minerals \u0026amp; Iron\u003c\/h3\u003e\n\u003cdl\u003e\n\u003cdiv\u003e\n\u003cdt\u003eFocus\u003c\/dt\u003e\n\u003cdd\u003eBroader nutritional context\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eRelevant when\u003c\/dt\u003e\n\u003cdd\u003eSeveral biomarkers may change the next step\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdt\u003eLimit\u003c\/dt\u003e\n\u003cdd\u003eIncidental findings are more likely\u003c\/dd\u003e\n\u003c\/div\u003e\n\u003c\/dl\u003e\u003c\/article\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"hsn_section hsn_glossary\" id=\"markers\"\u003e\u003cp class=\"hsn_eyebrow\"\u003ePlain-English biomarker guide\u003c\/p\u003e\n\u003ch2\u003eMarkers commonly considered for hair, skin and nail concerns\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eFerritin\u003c\/summary\u003e\u003cp\u003eA protein used as a marker of stored iron. Low ferritin supports iron deficiency, while inflammation and some medical conditions can increase ferritin.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIron profile\u003c\/summary\u003e\u003cp\u003eA group of measurements that may include serum iron, transferrin, total iron-binding capacity and transferrin saturation. These add context to ferritin but still require interpretation.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eTSH\u003c\/summary\u003e\u003cp\u003eA pituitary hormone used as a first-line marker of thyroid function. It is usually interpreted with free thyroid hormones where appropriate.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eFree T4 and free T3\u003c\/summary\u003e\u003cp\u003eCirculating thyroid hormones. Their usefulness depends on TSH, symptoms, medicines and the clinical question.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eThyroid antibodies\u003c\/summary\u003e\u003cp\u003eMarkers that can support autoimmune thyroid context. A positive antibody result does not by itself explain hair, skin or nail symptoms.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eVitamin B12 and folate\u003c\/summary\u003e\u003cp\u003eVitamins involved in blood formation and cell function. Deficiency can have dietary, absorption, medicine-related and autoimmune causes.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e25-hydroxyvitamin D\u003c\/summary\u003e\u003cp\u003eThe standard blood marker used to assess vitamin D status. Season, sun exposure and supplements can influence the result.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eBiotin\u003c\/summary\u003e\u003cp\u003eA vitamin commonly marketed for hair, skin and nails. High-dose supplements can interfere with some immunoassays, including certain thyroid and hormone tests.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"hsn_section\" id=\"preparation\"\u003e\u003cp class=\"hsn_eyebrow\"\u003ePreparation and limitations\u003c\/p\u003e\n\u003ch2\u003eImprove the usefulness of your result\u003c\/h2\u003e\n\u003cdiv class=\"hsn_grid3\"\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eRecord biotin supplements\u003c\/strong\u003e\u003cspan\u003eHigh-dose biotin may interfere with some thyroid and hormone laboratory tests. Follow the product or laboratory instructions.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eRecord iron and vitamin use\u003c\/strong\u003e\u003cspan\u003eSupplements can change results. Do not stop prescribed treatment without professional advice.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eNote illness and inflammation\u003c\/strong\u003e\u003cspan\u003eRecent illness can affect ferritin and several other biomarkers.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eConsider the timing of shedding\u003c\/strong\u003e\u003cspan\u003eDiffuse shedding may begin weeks or months after illness, childbirth, stress, surgery or rapid weight loss.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eCheck fasting instructions\u003c\/strong\u003e\u003cspan\u003ePreparation differs by test. Use the instructions supplied with the individual home kit.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003ePhotograph visible changes\u003c\/strong\u003e\u003cspan\u003eA dated record can help a clinician assess progression, distribution and response over time.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_warning\"\u003e\n\u003cstrong\u003eDo not treat laboratory numbers without investigating the pattern.\u003c\/strong\u003e\u003cp\u003eHair and nail disorders can need scalp examination, fungal testing, dermoscopy, medication review or specialist assessment. A broad blood panel cannot replace these steps.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"hsn_section\"\u003e\u003cp class=\"hsn_eyebrow\"\u003eHow home testing works\u003c\/p\u003e\n\u003ch2\u003eFrom choosing the kit to reviewing the result\u003c\/h2\u003e\n\u003cdiv class=\"hsn_process\"\u003e\n\u003cdiv class=\"hsn_step\"\u003e\n\u003cspan\u003e1\u003c\/span\u003e\u003ch3\u003eDefine the question\u003c\/h3\u003e\n\u003cp\u003eDecide whether iron, thyroid or nutritional testing is the most relevant route.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_step\"\u003e\n\u003cspan\u003e2\u003c\/span\u003e\u003ch3\u003eReview the markers\u003c\/h3\u003e\n\u003cp\u003eCheck the exact biomarker list, sample type, preparation and limitations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_step\"\u003e\n\u003cspan\u003e3\u003c\/span\u003e\u003ch3\u003eCollect carefully\u003c\/h3\u003e\n\u003cp\u003eUse the supplied equipment and follow collection instructions exactly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_step\"\u003e\n\u003cspan\u003e4\u003c\/span\u003e\u003ch3\u003eReturn the sample\u003c\/h3\u003e\n\u003cp\u003ePackage and send it through the specified route and timeframe.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_step\"\u003e\n\u003cspan\u003e5\u003c\/span\u003e\u003ch3\u003eLaboratory analysis\u003c\/h3\u003e\n\u003cp\u003eThe sample follows the relevant analytical and quality-control pathway.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_step\"\u003e\n\u003cspan\u003e6\u003c\/span\u003e\u003ch3\u003ePlan follow-up\u003c\/h3\u003e\n\u003cp\u003eArrange medical or dermatological review when symptoms or results require it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"hsn_section\"\u003e\u003cdiv class=\"hsn_lab\"\u003e\n\u003cdiv class=\"hsn_lab_copy\"\u003e\n\u003cp class=\"hsn_eyebrow\"\u003eLaboratory and testing standards\u003c\/p\u003e\n\u003ch2\u003eHome collection supported by a defined laboratory pathway\u003c\/h2\u003e\n\u003cp\u003eIron, thyroid and vitamin tests use different analytical methods and may have different preparation requirements. Check the current individual product specification for laboratory, accreditation, sample and reporting details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSample identity and acceptance checks\u003c\/li\u003e\n\u003cli\u003eAssay-specific quality controls\u003c\/li\u003e\n\u003cli\u003eDefined sample stability and return requirements\u003c\/li\u003e\n\u003cli\u003eSecure digital reporting\u003c\/li\u003e\n\u003cli\u003eClear test scope and stated limitations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"hsn_badges\"\u003e\n\u003cspan\u003eAssay-specific controls\u003c\/span\u003e\u003cspan\u003eSecure reporting\u003c\/span\u003e\u003cspan\u003eDefined test scope\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003csmall\u003eQuality and regulatory claims should be checked against the current product specification.\u003c\/small\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"hsn_lab_image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Laboratoryand_Testing_Standards.png?v=1785016220\" alt=\"Grace Belgravia laboratory and testing standards\" width=\"1600\" height=\"680\" loading=\"lazy\"\u003e\u003c\/figure\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"hsn_section\"\u003e\u003cp class=\"hsn_eyebrow\"\u003eResults and next steps\u003c\/p\u003e\n\u003ch2\u003eWhat an unexpected result may require\u003c\/h2\u003e\n\u003cdiv class=\"hsn_grid3\"\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eLow ferritin or abnormal iron profile\u003c\/strong\u003e\u003cspan\u003eReplacing iron may be only part of the response. Blood loss, diet, absorption and inflammation may need assessment.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eAbnormal thyroid markers\u003c\/strong\u003e\u003cspan\u003eRepeat testing, medicine review or clinical assessment may be appropriate before treatment decisions are made.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_tile\"\u003e\n\u003cstrong\u003eVitamin result outside range\u003c\/strong\u003e\u003cspan\u003eInterpret the degree of abnormality, symptoms, supplements and possible underlying cause before choosing a dose.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_notice\"\u003e\n\u003cstrong\u003eA normal result can still be useful.\u003c\/strong\u003e\u003cp\u003eIt may make selected nutritional, iron or thyroid explanations less likely, but it does not exclude pattern hair loss, alopecia areata, scalp disease, fungal nail disease, eczema or other dermatological causes.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"hsn_section\" id=\"medical-review\"\u003e\u003cdiv class=\"hsn_review_heading\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"hsn_eyebrow\"\u003eMedical and editorial review\u003c\/p\u003e\n\u003ch2\u003eMedically checked hair, skin and nails guidance\u003c\/h2\u003e\n\u003cp\u003eThe collection has been reviewed for responsible presentation of diffuse hair shedding, iron and thyroid testing, vitamin status, supplement interference and dermatological boundaries.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_seal\"\u003e\n\u003cspan\u003eMedically\u003c\/span\u003e\u003cstrong\u003eChecked\u003c\/strong\u003e\u003csmall\u003e28 July 2026\u003c\/small\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_review_grid\"\u003e\n\u003carticle class=\"hsn_review_card\"\u003e\u003cdiv class=\"hsn_review_top\"\u003e\n\u003cimg class=\"hsn_avatar\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/5W4A9892.jpg?v=1785070092\" alt=\"Portrait of Dr Laura Geige\" width=\"164\" height=\"164\" loading=\"lazy\"\u003e\u003cdiv\u003e\n\u003cspan class=\"hsn_review_label\"\u003eMedical oversight and safety\u003c\/span\u003e\u003ch3\u003eDr Laura Geige\u003c\/h3\u003e\n\u003cp class=\"hsn_review_title\"\u003eMedical Director, Senior Practitioner and Skin Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eReviewed medical boundaries, dermatological escalation, symptom wording and the distinction between laboratory context and diagnosis.\u003c\/p\u003e\n\u003ca href=\"\/pages\/dr-laura-geige-medical-director-senior-practitioner-and-skin-expert\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\u003carticle class=\"hsn_review_card\"\u003e\u003cdiv class=\"hsn_review_top\"\u003e\n\u003cimg class=\"hsn_avatar\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/rimas_geiga.png?v=1785071125\" alt=\"Portrait of Dr Rimas Geiga\" width=\"164\" height=\"164\" loading=\"lazy\"\u003e\u003cdiv\u003e\n\u003cspan class=\"hsn_review_label\"\u003eNutritional and metabolic evidence\u003c\/span\u003e\u003ch3\u003eDr Rimas Geiga\u003c\/h3\u003e\n\u003cp class=\"hsn_review_title\"\u003eMedical Doctor, Nutritional Sciences Adviser and Healthy Ageing Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eReviewed iron, vitamin, dietary and supplement-related information, including the limitations of broad nutritional testing.\u003c\/p\u003e\n\u003ca href=\"\/pages\/dr-rimas-geiga-medical-doctor-nutritional-sciences-adviser-and-healthy-ageing-expert\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\u003carticle class=\"hsn_review_card\"\u003e\u003cdiv class=\"hsn_review_top\"\u003e\n\u003cimg class=\"hsn_avatar\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Veronika_Matutyte_Doctor.jpg?v=1785075107\" alt=\"Portrait of Veronika Matutyte\" width=\"164\" height=\"164\" loading=\"lazy\"\u003e\u003cdiv\u003e\n\u003cspan class=\"hsn_review_label\"\u003eQuality and patient safety\u003c\/span\u003e\u003ch3\u003eVeronika Matutyte\u003c\/h3\u003e\n\u003cp class=\"hsn_review_title\"\u003eMedical Doctor and Healthcare Management Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eReviewed sample-pathway language, test limitations, biotin interference and follow-up safeguards.\u003c\/p\u003e\n\u003ca href=\"\/pages\/veronika-matutyte-medical-doctor-and-healthcare-management-expert\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hsn_review_meta\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMedical review date\u003c\/strong\u003e\u003cspan\u003e28 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEvidence checked\u003c\/strong\u003e\u003cspan\u003e28 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eNext scheduled review\u003c\/strong\u003e\u003cspan\u003eBy 28 July 2027 or earlier if guidance changes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/medical-advisory-board\"\u003e\u003cstrong\u003eMeet the Grace Belgravia Medical Expert Board\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"hsn_section hsn_sources\"\u003e\u003cp class=\"hsn_eyebrow\"\u003eAuthoritative references\u003c\/p\u003e\n\u003ch2\u003eUK clinical and dermatology sources\u003c\/h2\u003e\n\u003cdetails open\u003e\u003csummary\u003eHair loss and dermatology guidance\u003c\/summary\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.bad.org.uk\/pils\/telogen-effluvium\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"\u003eBritish Association of Dermatologists: telogen effluvium\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cks.nice.org.uk\/topics\/female-pattern-hair-loss-female-androgenetic-alopecia\/diagnosis\/investigations\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"\u003eNICE CKS: investigations for female pattern hair loss\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cks.nice.org.uk\/topics\/male-pattern-hair-loss-male-androgenetic-alopecia\/diagnosis\/investigations\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"\u003eNICE CKS: investigations for male pattern hair loss\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIron, thyroid and vitamin guidance\u003c\/summary\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nhs.uk\/conditions\/iron-deficiency-anaemia\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"\u003eNHS: iron-deficiency anaemia\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nice.org.uk\/guidance\/ng145\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"\u003eNICE: thyroid disease assessment and management\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nice.org.uk\/guidance\/ng239\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"\u003eNICE: vitamin B12 deficiency\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nhs.uk\/conditions\/vitamins-and-minerals\/vitamin-d\/\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"\u003eNHS: vitamin D\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.barnsleyhospital.nhs.uk\/pathology\/drugs-and-other-substances-can-interfere-biochemistry-tests\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"\u003eBarnsley Hospital NHS: biotin interference with laboratory tests\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"hsn_section hsn_faq\" id=\"faqs\"\u003e\u003cp class=\"hsn_eyebrow\"\u003eFrequently asked questions\u003c\/p\u003e\n\u003ch2\u003eHair, skin and nails blood test FAQs\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhich blood test should I choose for hair loss?\u003c\/summary\u003e\u003cp\u003eIt depends on the pattern and accompanying symptoms. Ferritin and iron testing may be relevant for diffuse shedding, while thyroid testing may be useful when thyroid symptoms are present. Sudden, patchy or scarring loss needs clinical assessment.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan low iron cause hair shedding?\u003c\/summary\u003e\u003cp\u003eIron deficiency is one possible contributor to diffuse hair shedding, but it is not the only cause. Ferritin and the wider iron profile should be interpreted with symptoms, blood loss, diet and inflammation.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan thyroid problems affect hair, skin and nails?\u003c\/summary\u003e\u003cp\u003eYes, thyroid dysfunction can be associated with hair, skin and nail changes, but these symptoms are non-specific and require appropriate interpretation.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eShould I choose the focused or advanced thyroid test?\u003c\/summary\u003e\u003cp\u003eChoose the focused test for a thyroid-function question. Choose the advanced panel when the additional antibody markers are specifically relevant.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan vitamin deficiency cause brittle nails?\u003c\/summary\u003e\u003cp\u003eSome nutritional deficiencies can affect nails, but trauma, fungal infection, psoriasis, eczema and other causes are common. A blood test cannot diagnose every nail condition.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes a vitamin D test diagnose hair loss?\u003c\/summary\u003e\u003cp\u003eNo. It measures vitamin D status and may add context when there are relevant risk factors, but it does not diagnose the cause of hair loss.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDo B12 and folate tests help with skin or hair concerns?\u003c\/summary\u003e\u003cp\u003eThey can identify selected vitamin abnormalities where diet, absorption or previous deficiency is relevant. They do not provide a complete hair or skin assessment.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan biotin affect my blood results?\u003c\/summary\u003e\u003cp\u003eYes. High-dose biotin marketed for hair, skin and nails can interfere with some laboratory immunoassays, including certain thyroid and hormone tests.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eShould I stop supplements before testing?\u003c\/summary\u003e\u003cp\u003eDo not stop prescribed supplements without advice. Record the product, dose and last dose and follow the test-specific preparation instructions.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan a normal blood test rule out all causes of hair loss?\u003c\/summary\u003e\u003cp\u003eNo. Pattern hair loss, alopecia areata, scalp inflammation, traction, fungal disease and scarring alopecia may require clinical or dermatological examination.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhen should I see a dermatologist?\u003c\/summary\u003e\u003cp\u003eSeek assessment for sudden, patchy, painful, inflamed or scarring hair loss, scalp changes, nail destruction or symptoms that persist despite normal blood results.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan hormones affect hair loss?\u003c\/summary\u003e\u003cp\u003eYes. Androgen-related hair loss, pregnancy, postpartum change and menopause can affect hair. A targeted hormone or clinical pathway may be more appropriate than a general nutrition panel.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I start iron after a low ferritin result?\u003c\/summary\u003e\u003cp\u003eDiscuss the result and the likely cause with a healthcare professional. Excess iron can be harmful and blood loss or absorption problems may need investigation.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre these collection materials medically reviewed?\u003c\/summary\u003e\u003cp\u003eThis collection guide has named medical and quality reviewers. The review process for an individual laboratory report depends on the specific test pathway.\u003c\/p\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection class=\"hsn_footer\"\u003e\u003ch2\u003eMedical and dermatological guidance\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThese tests provide selected laboratory information and do not replace medical or dermatological assessment, diagnosis or treatment.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeek appropriate care for sudden, patchy, scarring or rapidly worsening changes, significant symptoms or substantially abnormal results.\u003c\/p\u003e\u003c\/section\u003e\u003cdiv class=\"hsn_sticky\"\u003e\u003ca href=\"#tests\"\u003eCompare hair, skin \u0026amp; nails kits\u003c\/a\u003e\u003c\/div\u003e\u003c\/article\u003e\u003cscript\u003e\n(function(){var box=document.getElementById(\"hsn-result\"),buttons=document.querySelectorAll(\".hsn_choice\");if(!box||!buttons.length)return;var data={iron:'\u003cstrong\u003eConsider the Ferritin and Iron Profile.\u003c\/strong\u003e\u003cp\u003eThis route is most relevant when diffuse shedding occurs with possible low iron, heavy periods, fatigue or restricted dietary intake.\u003c\/p\u003e\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/blood-iron-test\"\u003eView iron profile\u003c\/a\u003e',thyroid:'\u003cstrong\u003eConsider a thyroid test.\u003c\/strong\u003e\u003cp\u003eStart with the focused thyroid-function test unless antibody context is specifically relevant.\u003c\/p\u003e\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/thyroid-function-test\"\u003eView focused thyroid test\u003c\/a\u003e',vitamins:'\u003cstrong\u003eConsider the Essential Vitamins Test.\u003c\/strong\u003e\u003cp\u003eIt combines vitamin B12, folate and vitamin D for a focused nutritional question.\u003c\/p\u003e\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/essential-vitamins-test\"\u003eView essential vitamins test\u003c\/a\u003e',broad:'\u003cstrong\u003eConsider the Vitamins, Minerals and Iron Test.\u003c\/strong\u003e\u003cp\u003eChoose the broader panel when several listed nutritional biomarkers are genuinely relevant.\u003c\/p\u003e\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/vitamins-minerals\"\u003eView broader panel\u003c\/a\u003e',vitd:'\u003cstrong\u003eConsider the focused Vitamin D Test.\u003c\/strong\u003e\u003cp\u003eThis is appropriate when vitamin D status is the specific question rather than a broader hair or nutrition assessment.\u003c\/p\u003e\u003ca class=\"hsn_btn hsn_btn_secondary\" href=\"\/products\/vitamin-d\"\u003eView vitamin D test\u003c\/a\u003e',clinical:'\u003cstrong\u003eA home blood test may not be the correct first step.\u003c\/strong\u003e\u003cp\u003eSudden, patchy, painful, inflamed or scarring hair loss and severe nail or skin changes require clinical or dermatological assessment.\u003c\/p\u003e'};buttons.forEach(function(btn){btn.addEventListener(\"click\",function(){buttons.forEach(function(b){b.setAttribute(\"aria-pressed\",\"false\")});btn.setAttribute(\"aria-pressed\",\"true\");box.innerHTML=data[btn.getAttribute(\"data-result\")]||\"\";box.classList.add(\"is-open\");box.scrollIntoView({behavior:\"smooth\",block:\"nearest\"})})})})();\n\u003c\/script\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"CollectionPage\",\"name\":\"Hair, Skin \u0026 Nails Blood Test Home Kits UK\",\"headline\":\"Hair, Skin \u0026 Nails Blood Test Home Kits UK\",\"description\":\"Compare private hair, skin and nails blood test home kits in the UK, including iron, ferritin, thyroid, vitamin D, B12, folate and nutrition 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uses CQC registered services\"\n        },\n        {\n          \"@type\": \"PropertyValue\",\n          \"name\": \"Collection equipment compliance\",\n          \"value\": \"UKCA and CE marked collection equipment within an ISO 13485 quality management framework\"\n        }\n      ]\n    },\n    {\n      \"@type\": \"MedicalWebPage\",\n      \"@id\": \"#webpage\",\n      \"name\": \"Home Vitamin Deficiency Test UK | B12, Folate \u0026 Vitamin D\",\n      \"description\": \"Order a home vitamin deficiency test in the UK. UKAS accredited and CQC registered labs measure total vitamin B12, serum folate and vitamin D.\",\n      \"inLanguage\": \"en-GB\",\n      \"datePublished\": \"2026-07-26\",\n      \"dateModified\": \"2026-07-26\",\n      \"lastReviewed\": \"2026-07-26\",\n      \"mainEntity\": {\n        \"@id\": \"#product\"\n      },\n      \"about\": [\n        {\n          \"@id\": \"#medical-test\"\n        },\n        {\n          \"@id\": \"#vitamin-deficiency-test\"\n        }\n      ],\n      \"author\": {\n        \"@id\": \"#organization\"\n      },\n      \"publisher\": {\n        \"@id\": \"#organization\"\n      },\n      \"editor\": {\n        \"@id\": \"#dr-rimas-geiga\"\n      },\n      \"accountablePerson\": {\n        \"@id\": \"#dr-laura-geige\"\n      },\n      \"reviewedBy\": [\n        {\n          \"@id\": \"#dr-rimas-geiga\"\n        },\n        {\n          \"@id\": \"#dr-snieguole-geige\"\n        },\n        {\n          \"@id\": \"#dr-laura-geige\"\n        }\n      ],\n      \"contributor\": [\n        {\n          \"@id\": \"#dr-rimas-geiga\"\n        },\n        {\n          \"@id\": \"#dr-snieguole-geige\"\n        },\n        {\n          \"@id\": \"#dr-laura-geige\"\n        }\n      ],\n      \"medicalAudience\": {\n        \"@type\": \"MedicalAudience\",\n        \"audienceType\": \"Patient\"\n      },\n      \"citation\": [\n        \"https:\/\/www.nice.org.uk\/guidance\/ng239\/chapter\/recommendations\",\n        \"https:\/\/www.nhs.uk\/conditions\/vitamin-b12-or-folate-deficiency-anaemia\/diagnosis\/\",\n        \"https:\/\/www.nhs.uk\/conditions\/vitamin-b12-or-folate-deficiency-anaemia\/treatment\/\",\n        \"https:\/\/www.gloshospitals.nhs.uk\/our-services\/services-we-offer\/pathology\/tests-and-investigations\/vitamin-b12-and-serum-folate\/\",\n        \"https:\/\/cks.nice.org.uk\/topics\/vitamin-d-deficiency-in-adults\/\",\n        \"https:\/\/swlimo.southwestlondon.icb.nhs.uk\/wp-content\/uploads\/SWL-Vitamin-D-Guidelines-for-Adults-and-Children.pdf\",\n        \"https:\/\/www.nice.org.uk\/guidance\/ng247\/chapter\/Recommendations\",\n        \"https:\/\/www.ukas.com\/accreditation\/standards\/medical-laboratory-accreditation\/\",\n        \"https:\/\/www.cqc.org.uk\/guidance-regulation\/providers\/registration\/scope-registration\/regulated-activities\/diagnostic-and-screening-procedures\"\n      ]\n    },\n    {\n      \"@type\": \"FAQPage\",\n      \"@id\": \"#faq\",\n      \"mainEntity\": [\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can I test vitamin levels at home?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes. This kit uses capillary blood collected at home and returned for laboratory analysis. It measures total vitamin B12, serum folate and 25 hydroxyvitamin D.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What vitamins does this blood test check?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"The panel checks total vitamin B12, serum folate, also known as vitamin B9, and 25 hydroxyvitamin D.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Is this a complete vitamin and mineral blood test?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"No. It measures three vitamins only. It does not include iron, ferritin, magnesium, zinc, calcium, vitamin B6, vitamin C or other micronutrients.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Do I need to fast for a vitamin blood test?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Fasting is not generally required for these three markers. Follow the kit instructions and record supplements, injections and recent high dose treatment.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Should I stop vitamin supplements before the test?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Do not stop prescribed supplements or injections without clinical advice. Supplements can influence results, so record the product, dose and timing. Where deficiency is being investigated, samples are ideally taken before replacement begins.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What is the difference between total B12 and active B12?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Total B12 measures vitamin B12 bound to several carrier proteins. Active B12 measures holotranscobalamin, the fraction available to cells. This product reports total B12 only.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can a normal vitamin B12 result rule out deficiency?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"No. Symptoms, supplements, pregnancy, medicines and laboratory limitations matter. Borderline or discordant results may require active B12, methylmalonic acid, homocysteine, a full blood count or further investigation.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What symptoms can occur with vitamin B12 deficiency?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Possible symptoms include tiredness, breathlessness, a sore tongue, pins and needles, numbness, balance problems, memory or concentration changes and visual symptoms. Neurological symptoms can occur without anaemia.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What can cause low vitamin B12?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Possible causes include autoimmune gastritis, pernicious anaemia, coeliac disease, bowel surgery, medicines such as metformin or proton pump inhibitors, dietary insufficiency and other malabsorption conditions.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What does a high vitamin B12 result mean?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"A high result is commonly caused by supplements or injections. Persistent unexplained elevation can also occur with liver, kidney, inflammatory or blood conditions and may require clinical review.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Is a high vitamin B12 result toxic?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"A high blood concentration does not usually mean acute vitamin B12 toxicity. It may reflect supplementation or another health condition, so interpretation should focus on the cause rather than assuming the vitamin itself is causing symptoms.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What does serum folate measure?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Serum folate reflects folate circulating in the blood and can change with recent dietary intake or supplements. It is useful in context but does not independently establish the cause of deficiency.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What can cause low folate?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Possible causes include low dietary intake, alcohol, coeliac disease, malabsorption, pregnancy, increased cell turnover and medicines such as methotrexate, some antiepileptics and trimethoprim.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What does a high folate result mean?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"A high serum folate result most often reflects recent food fortification or folic acid supplementation. It is not usually a toxicity diagnosis, but supplement use and vitamin B12 status should be reviewed.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can folic acid mask vitamin B12 deficiency?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes. Folic acid can improve the anaemia caused by vitamin B12 deficiency while neurological injury continues. Vitamin B12 should be assessed before treating suspected folate deficiency.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"How much folic acid is recommended before pregnancy?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"UK guidance advises most people who may become pregnant to take 400 micrograms daily before conception and through the first 12 weeks of pregnancy. Higher dose folic acid is used only for defined higher risk situations under clinical advice.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What vitamin D level is considered deficient in the UK?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Many UK pathways classify a 25 hydroxyvitamin D result below 25 nmol\/L as deficient.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What vitamin D level is considered insufficient?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"A level from 25 to 50 nmol\/L may be inadequate for some people. Symptoms, bone health, risk factors, supplements and local laboratory guidance affect management.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What vitamin D level is considered sufficient?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"A result above 50 nmol\/L is considered sufficient for most adults in many UK pathways. Higher is not automatically better.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can vitamin D levels be too high?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes. Very high vitamin D is most commonly caused by excessive supplementation and may lead to high calcium, causing thirst, frequent urination, nausea, constipation, weakness or confusion.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can low vitamin D cause tiredness or low mood?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Low vitamin D may coexist with tiredness, muscle weakness or bone pain, but these symptoms are non specific. A result should not be used to attribute all tiredness or mood symptoms to vitamin D.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What tests may be needed after a low B12 or folate result?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"A clinician may request a full blood count, blood film, active B12, methylmalonic acid, homocysteine, intrinsic factor antibodies, coeliac testing or other investigations based on symptoms and history.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"When are vitamin deficiency symptoms urgent?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Seek prompt medical assessment for new weakness, difficulty walking, rapidly worsening numbness, confusion, visual change, seizures, severe breathlessness, chest pain or symptoms during pregnancy.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Are the laboratories UKAS accredited and CQC registered?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Samples are processed through UKAS accredited laboratories within a CQC registered diagnostic pathway. Collection equipment is UKCA and CE marked and supported by an ISO 13485 quality management framework.\"\n          }\n        }\n      ]\n    },\n    {\n      \"@type\": \"HowTo\",\n      \"@id\": \"#howto\",\n      \"name\": \"How to complete the home vitamin deficiency test\",\n      \"description\": \"Record supplements and medicines, collect capillary blood at home and return it for accredited laboratory analysis.\",\n      \"step\": [\n        {\n          \"@type\": \"HowToStep\",\n          \"position\": 1,\n          \"name\": \"Record supplements and medicines\",\n          \"text\": \"Record vitamin B12, folic acid, vitamin D, injections, fortified products and relevant medicines.\"\n        },\n        {\n          \"@type\": \"HowToStep\",\n          \"position\": 2,\n          \"name\": \"Collect the sample\",\n          \"text\": \"Collect capillary blood into the supplied microtainer.\"\n        },\n        {\n          \"@type\": \"HowToStep\",\n          \"position\": 3,\n          \"name\": \"Return the sample\",\n          \"text\": \"Package and return the sample using the supplied transport materials.\"\n        },\n        {\n          \"@type\": \"HowToStep\",\n          \"position\": 4,\n          \"name\": \"Review the cause and wider context\",\n          \"text\": \"Interpret vitamin concentrations with symptoms, diet, supplements, medicines, absorption and related blood tests.\"\n        }\n      ]\n    },\n    {\n      \"@type\": \"Review\",\n      \"@id\": \"#clinical-content-review\",\n      \"name\": \"Vitamin profile nutritional evidence, safety and governance review\",\n      \"reviewBody\": \"The page was reviewed for total vitamin B12, serum folate and vitamin D interpretation, supplement effects, pregnancy guidance, neurological symptoms and further testing limitations.\",\n      \"datePublished\": \"2026-07-26\",\n      \"author\": {\n        \"@id\": \"#dr-rimas-geiga\"\n      },\n      \"contributor\": [\n        {\n          \"@id\": \"#dr-snieguole-geige\"\n        },\n        {\n          \"@id\": \"#dr-laura-geige\"\n        }\n      ],\n      \"itemReviewed\": {\n        \"@id\": \"#webpage\"\n      }\n    }\n  ]\n}\u003c\/script\u003e\n\n\u003carticle class=\"vitamin_product\"\u003e\n\u003csection class=\"vitamin_hero\"\u003e\n\u003cp class=\"vitamin_eyebrow\"\u003eAt home vitamin blood test\u003c\/p\u003e\n\u003ch2\u003eHome Vitamin Deficiency Test UK | B12, Folate \u0026amp; Vitamin D\u003c\/h2\u003e\n\u003cp class=\"vitamin_lead\"\u003e\u003cstrong\u003eA three marker home blood test measuring total vitamin B12, serum folate and vitamin D through a UK laboratory pathway.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe panel provides selected information about vitamins involved in blood formation, neurological health, DNA synthesis and bone health. Results should be interpreted with symptoms, supplements, medicines, diet and possible absorption problems.\u003c\/p\u003e\n\u003cdiv class=\"vitamin_grid\"\u003e\n\u003cdiv class=\"vitamin_stat\"\u003e\n\u003cstrong\u003e3 biomarkers\u003c\/strong\u003e\u003cspan\u003eTotal vitamin B12, serum folate and 25 hydroxyvitamin D\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_stat\"\u003e\n\u003cstrong\u003eHome collection\u003c\/strong\u003e\u003cspan\u003eCapillary blood collected into the supplied microtainer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_stat\"\u003e\n\u003cstrong\u003eUK laboratory pathway\u003c\/strong\u003e\u003cspan\u003eUKAS accredited and CQC registered laboratory processing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_stat\"\u003e\n\u003cstrong\u003eProduct code\u003c\/strong\u003e\u003cspan\u003eC1BLP02200\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_notice\"\u003e\n\u003cstrong\u003eFocused vitamin profile, not a complete nutritional screen\u003c\/strong\u003e\n\u003cp\u003eThis product does not include a full blood count, ferritin, iron, calcium, magnesium, zinc, active B12, methylmalonic acid, homocysteine or tests for the cause of malabsorption.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_warning\"\u003e\n\u003cstrong\u003eNeurological or severe symptoms should not wait for home testing\u003c\/strong\u003e\n\u003cp\u003eSeek prompt medical assessment for new weakness, difficulty walking, rapidly worsening numbness, confusion, visual change, seizures, severe breathlessness, chest pain or concerning symptoms during pregnancy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section\"\u003e\n\u003cp class=\"vitamin_eyebrow\"\u003eQuality and compliance\u003c\/p\u003e\n\u003ch3\u003eHome vitamin testing supported by UK standards\u003c\/h3\u003e\n\u003cdiv class=\"vitamin_trust_grid\"\u003e\n\u003cdiv class=\"vitamin_trust_item\"\u003e\n\u003cstrong\u003eUKAS accredited laboratories\u003c\/strong\u003e\n\u003cspan\u003eISO 15189 accreditation supports laboratory competence, quality systems and diagnostic performance.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_trust_item\"\u003e\n\u003cstrong\u003eCQC registered services\u003c\/strong\u003e\n\u003cspan\u003eThe diagnostic pathway uses organisations registered with the Care Quality Commission.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_trust_item\"\u003e\n\u003cstrong\u003eCompliant collection equipment\u003c\/strong\u003e\n\u003cspan\u003eUKCA and CE marked equipment supported by an ISO 13485 quality management framework.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_trust_item\"\u003e\n\u003cstrong\u003eClinically bounded claims\u003c\/strong\u003e\n\u003cspan\u003eThe page distinguishes a vitamin concentration from diagnosis, symptom attribution and treatment decisions.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section\"\u003e\n\u003ch3\u003eWhat this vitamin deficiency test measures\u003c\/h3\u003e\n\u003cdiv class=\"vitamin_table_wrap\"\u003e\n\u003ctable class=\"vitamin_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eMarker\u003c\/th\u003e\n\u003cth scope=\"col\"\u003ePrimary role\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eImportant limitation\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal vitamin B12\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed blood cell production, DNA synthesis and neurological function\u003c\/td\u003e\n\u003ctd\u003eTotal B12 is not the same as active B12 and may need confirmatory testing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSerum folate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDNA synthesis, cell division and red blood cell production\u003c\/td\u003e\n\u003ctd\u003eReflects recent intake and must be interpreted with vitamin B12.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e25 hydroxyvitamin D\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCalcium regulation, bones and muscle function\u003c\/td\u003e\n\u003ctd\u003eSymptoms are non specific and higher levels are not automatically better.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section\"\u003e\n\u003ch3\u003eWho may consider this test?\u003c\/h3\u003e\n\u003cp\u003eThis home vitamin blood test may be considered by adults seeking selected vitamin information in the context of:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePersistent tiredness, weakness or a sore tongue alongside clinical assessment\u003c\/li\u003e\n\u003cli\u003ePins and needles, numbness, balance or memory concerns\u003c\/li\u003e\n\u003cli\u003eBone pain, muscle weakness or known osteoporosis risk\u003c\/li\u003e\n\u003cli\u003eA vegan or highly restricted diet\u003c\/li\u003e\n\u003cli\u003eCoeliac disease, bowel surgery, inflammatory bowel disease or another malabsorption risk\u003c\/li\u003e\n\u003cli\u003eMetformin, proton pump inhibitors, antiepileptics or other relevant medicines\u003c\/li\u003e\n\u003cli\u003ePregnancy planning or pregnancy where folate advice is required\u003c\/li\u003e\n\u003cli\u003eA previous low, high or borderline vitamin result\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTiredness and low mood are non specific and may have causes not measured by this panel.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section\"\u003e\n\u003ch3\u003eHow the home vitamin test works\u003c\/h3\u003e\n\u003cdiv class=\"vitamin_steps\"\u003e\n\u003cdiv class=\"vitamin_step\"\u003e\n\u003cspan class=\"vitamin_step_number\"\u003e1\u003c\/span\u003e\n\u003ch4\u003eRecord supplements and medicines\u003c\/h4\u003e\n\u003cp\u003eNote all tablets, sprays, injections, fortified products, medicines and recent treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_step\"\u003e\n\u003cspan class=\"vitamin_step_number\"\u003e2\u003c\/span\u003e\n\u003ch4\u003eCollect and return\u003c\/h4\u003e\n\u003cp\u003eCollect capillary blood into the supplied microtainer and return it using the provided packaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_step\"\u003e\n\u003cspan class=\"vitamin_step_number\"\u003e3\u003c\/span\u003e\n\u003ch4\u003eReview the cause, not only the number\u003c\/h4\u003e\n\u003cp\u003eInterpret each result with symptoms, diet, absorption, medicines and related blood tests.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section\"\u003e\n\u003ch3\u003ePreparing for the test\u003c\/h3\u003e\n\u003cdiv class=\"vitamin_table_wrap\"\u003e\n\u003ctable class=\"vitamin_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePreparation\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFasting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFasting is not generally required. Follow the supplied kit instructions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVitamin B12\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord tablets, oral sprays, injections and the date of the most recent dose.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFolate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord folic acid, prenatal vitamins, fortified products and relevant medicines.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVitamin D\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord the daily or weekly dose, calcium products and any recent loading course.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrescribed treatment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDo not stop prescribed replacement or injections unless a clinician advises you to do so.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePregnancy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord pregnancy or pregnancy planning and follow NHS folic acid and vitamin D advice.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelated conditions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord coeliac disease, bowel surgery, autoimmune gastritis, kidney disease, liver disease and malabsorption.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section\"\u003e\n\u003ch3\u003eCommon vitamin result patterns\u003c\/h3\u003e\n\u003cp\u003eThese simplified patterns support discussion and are not diagnoses.\u003c\/p\u003e\n\u003cdiv class=\"vitamin_table_wrap\"\u003e\n\u003ctable class=\"vitamin_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePattern\u003c\/th\u003e\n\u003cth scope=\"col\"\u003ePossible context\u003c\/th\u003e\n\u003cth scope=\"col\"\u003ePossible next step\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLow B12 with neurological symptoms\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay indicate clinically important deficiency even without confirmed anaemia.\u003c\/td\u003e\n\u003ctd\u003eArrange prompt medical assessment and investigation of the cause.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBorderline B12 with persistent symptoms\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTotal B12 may not fully reflect functional deficiency.\u003c\/td\u003e\n\u003ctd\u003eConsider active B12, methylmalonic acid, homocysteine and a full blood count.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLow folate with unknown B12 status\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFolate replacement could improve anaemia while untreated B12 neurological injury continues.\u003c\/td\u003e\n\u003ctd\u003eAssess vitamin B12 before starting folic acid treatment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh B12 or folate while supplementing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOften reflects recent tablets, injections or fortified products.\u003c\/td\u003e\n\u003ctd\u003eReview dose and timing rather than assuming toxicity.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVitamin D below 25 nmol\/L\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDeficiency associated with musculoskeletal and bone health risk.\u003c\/td\u003e\n\u003ctd\u003eDiscuss replacement and whether calcium or other investigations are required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section\"\u003e\n\u003ch3\u003eBiomarkers and result interpretation\u003c\/h3\u003e\n\u003cp\u003eSelect each marker to read what it measures, preparation guidance and how low, normal, high or urgent results may be considered.\u003c\/p\u003e\n\u003cdetails class=\"vitamin_biomarker\"\u003e\n\u003csummary\u003eTotal vitamin B12\u003c\/summary\u003e\n\u003cdiv class=\"vitamin_biomarker_body\"\u003e\n\u003cp\u003eVitamin B12 supports red blood cell formation, DNA synthesis and normal neurological function. This test measures total circulating vitamin B12 rather than active B12.\u003c\/p\u003e\n\u003cp\u003eTotal B12 is useful as a first line marker but should be interpreted with symptoms, a full blood count, supplement use, medicines and possible malabsorption. Neurological deficiency can occur without anaemia.\u003c\/p\u003e\n\u003cdiv class=\"vitamin_subnote\"\u003e\n\u003cstrong\u003eBorderline results\u003c\/strong\u003e\n\u003cp\u003eWhere symptoms and total B12 do not agree, NICE guidance may support further testing with active B12, methylmalonic acid or homocysteine depending on the clinical situation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFasting is not generally required. Record multivitamins, vitamin B12 tablets, sprays or injections, folic acid, vitamin D, calcium products and any recent high dose treatment. Do not stop prescribed supplements without medical advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vitamin_table_wrap\"\u003e\n\u003ctable class=\"vitamin_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA markedly low result may support significant deficiency, particularly with neurological or haematological symptoms.\u003c\/td\u003e\n\u003ctd\u003eArrange prompt clinical review. Do not delay treatment where a clinician suspects serious neurological involvement.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur with autoimmune gastritis, pernicious anaemia, dietary insufficiency, malabsorption, bowel surgery or medicine effects.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the cause, a full blood count and whether confirmatory or treatment tests are needed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFalls within the laboratory interval.\u003c\/td\u003e\n\u003ctd\u003eA normal result does not completely exclude deficiency when symptoms, supplements or clinical risk remain significant.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMost commonly reflects supplements or injections, but persistent unexplained elevation can occur with liver, kidney, inflammatory or haematological conditions.\u003c\/td\u003e\n\u003ctd\u003eReview supplement timing and discuss a persistent unexplained result with a GP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very high result is not usually an acute toxicity diagnosis, but may warrant investigation when not explained by treatment.\u003c\/td\u003e\n\u003ctd\u003eSeek clinical review rather than assuming the vitamin itself is causing severe symptoms.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"vitamin_biomarker\"\u003e\n\u003csummary\u003eVitamin D (25 hydroxyvitamin D)\u003c\/summary\u003e\n\u003cdiv class=\"vitamin_biomarker_body\"\u003e\n\u003cp\u003e25 hydroxyvitamin D is the standard blood marker used to assess vitamin D status. Vitamin D supports calcium regulation, bones and muscle function.\u003c\/p\u003e\n\u003cp\u003eRoutine testing is not recommended for every asymptomatic adult. The result should be considered with musculoskeletal symptoms, bone health, sunlight exposure, skin pigmentation, diet, supplements and medical history.\u003c\/p\u003e\n\u003cdiv class=\"vitamin_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFasting is not generally required. Record multivitamins, vitamin B12 tablets, sprays or injections, folic acid, vitamin D, calcium products and any recent high dose treatment. Do not stop prescribed supplements without medical advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vitamin_table_wrap\"\u003e\n\u003ctable class=\"vitamin_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_low\"\u003eDeficient\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eBelow 25 nmol\/L is classified as deficient in many UK pathways.\u003c\/td\u003e\n\u003ctd\u003eDiscuss replacement, possible causes and whether calcium or other investigations are required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_low\"\u003eInsufficient\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e25 to 50 nmol\/L may be inadequate for some people, particularly where symptoms or risk factors are present.\u003c\/td\u003e\n\u003ctd\u003eReview supplementation, diet and safe sunlight advice with a clinician or pharmacist.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_normal\"\u003eSufficient\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eAbove 50 nmol\/L is sufficient for most adults in many UK pathways.\u003c\/td\u003e\n\u003ctd\u003eAvoid assuming that progressively higher levels provide additional benefit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA high result is commonly related to supplementation and may require review of the dose and calcium status.\u003c\/td\u003e\n\u003ctd\u003eStop non prescribed high dose products and seek clinical advice.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_critical\"\u003eConsider toxicity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eVery high vitamin D can cause hypercalcaemia, with thirst, frequent urination, nausea, constipation, weakness or confusion.\u003c\/td\u003e\n\u003ctd\u003eArrange prompt medical assessment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"vitamin_biomarker\"\u003e\n\u003csummary\u003eSerum folate (vitamin B9)\u003c\/summary\u003e\n\u003cdiv class=\"vitamin_biomarker_body\"\u003e\n\u003cp\u003eFolate is needed for DNA synthesis and normal red blood cell production. Serum folate reflects recent circulating folate and can change with diet, fortified food and supplements.\u003c\/p\u003e\n\u003cp\u003eA low result may support deficiency, but the cause must be investigated. Vitamin B12 should be assessed before folic acid treatment because folic acid can improve anaemia while neurological B12 deficiency continues.\u003c\/p\u003e\n\u003cdiv class=\"vitamin_subnote\"\u003e\n\u003cstrong\u003ePregnancy planning\u003c\/strong\u003e\n\u003cp\u003eMost people who may become pregnant are advised to take 400 micrograms of folic acid daily before conception and through the first 12 weeks. Higher doses require clinical guidance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFasting is not generally required. Record multivitamins, vitamin B12 tablets, sprays or injections, folic acid, vitamin D, calcium products and any recent high dose treatment. Do not stop prescribed supplements without medical advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vitamin_table_wrap\"\u003e\n\u003ctable class=\"vitamin_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA markedly low result may support significant folate deficiency, particularly with anaemia, pregnancy or severe nutritional risk.\u003c\/td\u003e\n\u003ctd\u003eArrange prompt clinical review and assess vitamin B12 before treatment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur with low intake, alcohol, malabsorption, pregnancy, increased requirements or medicines.\u003c\/td\u003e\n\u003ctd\u003eDiscuss diet, medicines, a full blood count, vitamin B12 and the underlying cause.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFalls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eA normal serum folate does not rule out every cause of anaemia or neurological symptoms.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMost often reflects recent dietary intake, fortified foods or folic acid supplementation.\u003c\/td\u003e\n\u003ctd\u003eReview supplement dose and vitamin B12 status rather than treating the number as toxicity.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vitamin_status vitamin_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very high serum result is usually supplement related and is not itself a reliable explanation for severe neurological symptoms.\u003c\/td\u003e\n\u003ctd\u003eDiscuss high dose folic acid use and ensure vitamin B12 deficiency has not been overlooked.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section\"\u003e\n\u003ch3\u003eWhat this panel does not include\u003c\/h3\u003e\n\u003cdiv class=\"vitamin_table_wrap\"\u003e\n\u003ctable class=\"vitamin_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eNot included\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhy it may matter\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull blood count and blood film\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay identify anaemia, macrocytosis and other blood cell changes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eActive B12\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMeasures holotranscobalamin and may help when total B12 is borderline or discordant.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMethylmalonic acid and homocysteine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay support assessment of functional vitamin B12 or folate deficiency.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntrinsic factor antibodies\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay support investigation of autoimmune gastritis or pernicious anaemia.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFerritin and iron studies\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIron deficiency can coexist with B12 or folate deficiency and also cause tiredness or anaemia.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCalcium, phosphate and parathyroid hormone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay be required where vitamin D is very low, very high or associated with bone or calcium symptoms.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section\" id=\"content-standards\"\u003e\n\u003cp class=\"vitamin_eyebrow\"\u003eEvidence and content standards\u003c\/p\u003e\n\u003ch3\u003eHow this product information was prepared\u003c\/h3\u003e\n\u003cp\u003eThis page was prepared from the supplied three marker Essential Vitamins specification and checked against current NICE, NHS, UKAS and CQC information on total vitamin B12, serum folate, vitamin D, supplement interference, pregnancy and further investigation.\u003c\/p\u003e\n\u003cdiv class=\"vitamin_method_grid\"\u003e\n\u003cdiv class=\"vitamin_method_item\"\u003e\n\u003cstrong\u003eProduct specification checked\u003c\/strong\u003e\n\u003cspan\u003eAt home format, capillary specimen, three biomarkers, supplement guidance and product code.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_method_item\"\u003e\n\u003cstrong\u003eUK clinical evidence checked\u003c\/strong\u003e\n\u003cspan\u003eNICE and NHS sources used for B12 limitations, folate safety, pregnancy advice and vitamin D categories.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_method_item\"\u003e\n\u003cstrong\u003eErrors corrected\u003c\/strong\u003e\n\u003cspan\u003eUnsupported high B12 and high folate toxicity claims were removed, and the risk of masking B12 deficiency was added.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_method_item\"\u003e\n\u003cstrong\u003eReview cycle\u003c\/strong\u003e\n\u003cspan\u003eReview at least annually and earlier when vitamin guidance, laboratory methods or pregnancy advice changes.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section\" id=\"medical-review\"\u003e\n\u003cp class=\"vitamin_eyebrow\"\u003eClinical accountability\u003c\/p\u003e\n\u003ch3\u003eNutritional evidence, patient safety and clinical governance review\u003c\/h3\u003e\n\u003cp\u003eThe review roles are separated across nutritional interpretation, medical safety and clinical governance. The reviewers are not presented as consultant haematologists or metabolic bone specialists.\u003c\/p\u003e\n\u003cdiv class=\"vitamin_review_grid\"\u003e\n\u003carticle class=\"vitamin_review_card\"\u003e\n\u003cdiv class=\"vitamin_review_card_top\"\u003e\n\u003cdiv aria-label=\"Portrait of Dr Rimas Geiga\" class=\"vitamin_review_avatar vitamin_review_avatar_rimas\" role=\"img\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"vitamin_review_label\"\u003eNutritional and healthy ageing evidence reviewed by\u003c\/span\u003e\n\u003ch4 class=\"vitamin_review_name\"\u003eDr Rimas Geiga\u003c\/h4\u003e\n\u003cp class=\"vitamin_review_title\"\u003eMedical Doctor, Nutritional Sciences Adviser and Healthy Ageing Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vitamin_review_scope\"\u003eReviewed dietary and supplement context, vitamin D, B12 and folate interpretation, malabsorption risks and responsible nutrition information.\u003c\/p\u003e\n\u003ca class=\"vitamin_review_link\" href=\"\/pages\/dr-rimas-geiga-medical-doctor-nutritional-sciences-adviser-and-healthy-ageing-expert\"\u003eView professional profile\u003c\/a\u003e\n\u003c\/article\u003e\n\u003carticle class=\"vitamin_review_card\"\u003e\n\u003cdiv class=\"vitamin_review_card_top\"\u003e\n\u003cdiv aria-label=\"Portrait of Dr Snieguole Geige\" class=\"vitamin_review_avatar vitamin_review_avatar_snieguole\" role=\"img\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"vitamin_review_label\"\u003eMedical safety and deficiency limitations reviewed by\u003c\/span\u003e\n\u003ch4 class=\"vitamin_review_name\"\u003eDr Snieguole Geige\u003c\/h4\u003e\n\u003cp class=\"vitamin_review_title\"\u003eDentist, Medical Doctor and Senior Adviser\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vitamin_review_scope\"\u003eReviewed neurological warning signs, folic acid masking risk, pregnancy cautions, medicine disclosure and appropriate follow up.\u003c\/p\u003e\n\u003ca class=\"vitamin_review_link\" href=\"\/pages\/dr-snieguole-geige-dentist-medical-doctor-and-senior-adviser\"\u003eView professional profile\u003c\/a\u003e\n\u003c\/article\u003e\n\u003carticle class=\"vitamin_review_card\"\u003e\n\u003cdiv class=\"vitamin_review_card_top\"\u003e\n\u003cdiv aria-label=\"Portrait of Dr Laura Geige\" class=\"vitamin_review_avatar vitamin_review_avatar_laura\" role=\"img\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"vitamin_review_label\"\u003eClinical governance and patient communication oversight\u003c\/span\u003e\n\u003ch4 class=\"vitamin_review_name\"\u003eDr Laura Geige\u003c\/h4\u003e\n\u003cp class=\"vitamin_review_title\"\u003eMedical Director, Senior Practitioner and Skin Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vitamin_review_scope\"\u003eReviewed claims compliance, patient facing clarity, supplement boundaries and the distinction between a laboratory concentration and a clinical diagnosis.\u003c\/p\u003e\n\u003ca class=\"vitamin_review_link\" href=\"\/pages\/dr-laura-geige-medical-director-senior-practitioner-and-skin-expert\"\u003eView professional profile\u003c\/a\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vitamin_review_meta\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEvidence checked\u003c\/strong\u003e\n\u003cspan\u003e26 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eClinical review date\u003c\/strong\u003e\n\u003cspan\u003e26 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eNext scheduled review\u003c\/strong\u003e\n\u003cspan\u003eBy 26 July 2027 or earlier when UK guidance changes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vitamin_board_link\"\u003e\u003ca href=\"\/pages\/medical-advisory-board\"\u003eMeet the Grace Belgravia Medical Advisory Board\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section vitamin_sources\"\u003e\n\u003cp class=\"vitamin_eyebrow\"\u003eAuthoritative references\u003c\/p\u003e\n\u003ch3\u003eUK vitamin testing and deficiency sources\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003eView the evidence sources used\u003c\/summary\u003e\n\u003cdiv class=\"vitamin_sources_body\"\u003e\n\u003cul\u003e\n\u003cli\u003eNICE NG239: vitamin B12 deficiency in adults\u003c\/li\u003e\n\u003cli\u003eNHS: vitamin B12 or folate deficiency anaemia diagnosis and treatment\u003c\/li\u003e\n\u003cli\u003eNHS laboratory guidance on total vitamin B12 and serum folate\u003c\/li\u003e\n\u003cli\u003eNICE CKS: vitamin D deficiency in adults\u003c\/li\u003e\n\u003cli\u003eSouth West London NHS vitamin D guidance\u003c\/li\u003e\n\u003cli\u003eNICE maternal and child nutrition guidance on folic acid\u003c\/li\u003e\n\u003cli\u003eUKAS ISO 15189 medical laboratory accreditation information\u003c\/li\u003e\n\u003cli\u003eCQC guidance on diagnostic and screening procedures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_section vitamin_faq\"\u003e\n\u003cp class=\"vitamin_eyebrow\"\u003eSearch led questions\u003c\/p\u003e\n\u003ch3\u003eHome vitamin deficiency test FAQs\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I test vitamin levels at home?\u003c\/summary\u003e\n\u003cp\u003eYes. This kit uses capillary blood collected at home and returned for laboratory analysis. It measures total vitamin B12, serum folate and 25 hydroxyvitamin D.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat vitamins does this blood test check?\u003c\/summary\u003e\n\u003cp\u003eThe panel checks total vitamin B12, serum folate, also known as vitamin B9, and 25 hydroxyvitamin D.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this a complete vitamin and mineral blood test?\u003c\/summary\u003e\n\u003cp\u003eNo. It measures three vitamins only. It does not include iron, ferritin, magnesium, zinc, calcium, vitamin B6, vitamin C or other micronutrients.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to fast for a vitamin blood test?\u003c\/summary\u003e\n\u003cp\u003eFasting is not generally required for these three markers. Follow the kit instructions and record supplements, injections and recent high dose treatment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I stop vitamin supplements before the test?\u003c\/summary\u003e\n\u003cp\u003eDo not stop prescribed supplements or injections without clinical advice. Supplements can influence results, so record the product, dose and timing. Where deficiency is being investigated, samples are ideally taken before replacement begins.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between total B12 and active B12?\u003c\/summary\u003e\n\u003cp\u003eTotal B12 measures vitamin B12 bound to several carrier proteins. Active B12 measures holotranscobalamin, the fraction available to cells. This product reports total B12 only.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan a normal vitamin B12 result rule out deficiency?\u003c\/summary\u003e\n\u003cp\u003eNo. Symptoms, supplements, pregnancy, medicines and laboratory limitations matter. Borderline or discordant results may require active B12, methylmalonic acid, homocysteine, a full blood count or further investigation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat symptoms can occur with vitamin B12 deficiency?\u003c\/summary\u003e\n\u003cp\u003ePossible symptoms include tiredness, breathlessness, a sore tongue, pins and needles, numbness, balance problems, memory or concentration changes and visual symptoms. Neurological symptoms can occur without anaemia.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat can cause low vitamin B12?\u003c\/summary\u003e\n\u003cp\u003ePossible causes include autoimmune gastritis, pernicious anaemia, coeliac disease, bowel surgery, medicines such as metformin or proton pump inhibitors, dietary insufficiency and other malabsorption conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does a high vitamin B12 result mean?\u003c\/summary\u003e\n\u003cp\u003eA high result is commonly caused by supplements or injections. Persistent unexplained elevation can also occur with liver, kidney, inflammatory or blood conditions and may require clinical review.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs a high vitamin B12 result toxic?\u003c\/summary\u003e\n\u003cp\u003eA high blood concentration does not usually mean acute vitamin B12 toxicity. It may reflect supplementation or another health condition, so interpretation should focus on the cause rather than assuming the vitamin itself is causing symptoms.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does serum folate measure?\u003c\/summary\u003e\n\u003cp\u003eSerum folate reflects folate circulating in the blood and can change with recent dietary intake or supplements. It is useful in context but does not independently establish the cause of deficiency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat can cause low folate?\u003c\/summary\u003e\n\u003cp\u003ePossible causes include low dietary intake, alcohol, coeliac disease, malabsorption, pregnancy, increased cell turnover and medicines such as methotrexate, some antiepileptics and trimethoprim.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does a high folate result mean?\u003c\/summary\u003e\n\u003cp\u003eA high serum folate result most often reflects recent food fortification or folic acid supplementation. It is not usually a toxicity diagnosis, but supplement use and vitamin B12 status should be reviewed.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan folic acid mask vitamin B12 deficiency?\u003c\/summary\u003e\n\u003cp\u003eYes. Folic acid can improve the anaemia caused by vitamin B12 deficiency while neurological injury continues. Vitamin B12 should be assessed before treating suspected folate deficiency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow much folic acid is recommended before pregnancy?\u003c\/summary\u003e\n\u003cp\u003eUK guidance advises most people who may become pregnant to take 400 micrograms daily before conception and through the first 12 weeks of pregnancy. Higher dose folic acid is used only for defined higher risk situations under clinical advice.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat vitamin D level is considered deficient in the UK?\u003c\/summary\u003e\n\u003cp\u003eMany UK pathways classify a 25 hydroxyvitamin D result below 25 nmol\/L as deficient.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat vitamin D level is considered insufficient?\u003c\/summary\u003e\n\u003cp\u003eA level from 25 to 50 nmol\/L may be inadequate for some people. Symptoms, bone health, risk factors, supplements and local laboratory guidance affect management.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat vitamin D level is considered sufficient?\u003c\/summary\u003e\n\u003cp\u003eA result above 50 nmol\/L is considered sufficient for most adults in many UK pathways. Higher is not automatically better.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan vitamin D levels be too high?\u003c\/summary\u003e\n\u003cp\u003eYes. Very high vitamin D is most commonly caused by excessive supplementation and may lead to high calcium, causing thirst, frequent urination, nausea, constipation, weakness or confusion.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan low vitamin D cause tiredness or low mood?\u003c\/summary\u003e\n\u003cp\u003eLow vitamin D may coexist with tiredness, muscle weakness or bone pain, but these symptoms are non specific. A result should not be used to attribute all tiredness or mood symptoms to vitamin D.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat tests may be needed after a low B12 or folate result?\u003c\/summary\u003e\n\u003cp\u003eA clinician may request a full blood count, blood film, active B12, methylmalonic acid, homocysteine, intrinsic factor antibodies, coeliac testing or other investigations based on symptoms and history.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen are vitamin deficiency symptoms urgent?\u003c\/summary\u003e\n\u003cp\u003eSeek prompt medical assessment for new weakness, difficulty walking, rapidly worsening numbness, confusion, visual change, seizures, severe breathlessness, chest pain or symptoms during pregnancy.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre the laboratories UKAS accredited and CQC registered?\u003c\/summary\u003e\n\u003cp\u003eSamples are processed through UKAS accredited laboratories within a CQC registered diagnostic pathway. Collection equipment is UKCA and CE marked and supported by an ISO 13485 quality management framework.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"vitamin_footer_note\"\u003e\n\u003ch3\u003eMedical guidance\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis panel measures selected vitamin concentrations. It does not diagnose the underlying cause of deficiency or replace a full blood count and clinical assessment.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeek prompt medical assessment for new weakness, difficulty walking, rapidly worsening numbness, confusion, visual change, seizures, severe breathlessness, chest pain or concerning symptoms during pregnancy.\u003c\/p\u003e\n\u003cp\u003eDo not start high dose vitamin D or folic acid, or stop prescribed vitamin replacement, solely from a home result without appropriate advice.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/article\u003e\n\n\u003c\/body\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":54409978708307,"sku":"476-essential-vitamins-t","price":99.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Vitamin_Deficiency_Test_UK_-_B12_Folate_Vitamin_D.png?v=1785173829"},{"product_id":"thyroid-function-test","title":"Home Thyroid Test Kit UK - TSH, T3 \u0026 T4 Blood Test","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cmeta content=\"width=device-width, initial-scale=1\" name=\"viewport\"\u003e\u003cmeta content=\"Order a home thyroid test kit in the UK. UKAS accredited and CQC registered labs measure TSH, free T3 and free T4 for thyroid function assessment.\" name=\"description\"\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  .thyroid_product {\n    --thyroid_ink: #2f2a28;\n    --thyroid_muted: #6f625d;\n    --thyroid_taupe: #786863;\n    --thyroid_taupe_dark: #5e4c46;\n    --thyroid_cream: #f5eee3;\n    --thyroid_line: #ded2c5;\n    --thyroid_white: #ffffff;\n    --thyroid_green_bg: #e8f3e9;\n    --thyroid_green_text: #345f3f;\n    --thyroid_amber_bg: #fff1cf;\n    --thyroid_amber_text: #7b5715;\n    --thyroid_orange_bg: #f9e7d7;\n    --thyroid_orange_text: #8a4d2d;\n    --thyroid_red_bg: #f8dfdf;\n    --thyroid_red_text: #8f3535;\n    --thyroid_blue_bg: #e8eef4;\n    --thyroid_blue_text: #405c72;\n    color: var(--thyroid_ink);\n    font-family: inherit;\n    font-size: 16px;\n    line-height: 1.7;\n    margin: 0 auto;\n    max-width: 1120px;\n  }\n\n  .thyroid_product * { box-sizing: border-box; }\n\n  .thyroid_product h2,\n  .thyroid_product h3,\n  .thyroid_product h4 {\n    color: var(--thyroid_ink);\n    line-height: 1.2;\n    margin-top: 0;\n  }\n\n  .thyroid_product h2 {\n    font-family: Georgia, \"Times New Roman\", serif;\n    font-size: clamp(32px, 5vw, 54px);\n    font-weight: 500;\n    margin-bottom: 18px;\n  }\n\n  .thyroid_product h3 {\n    font-family: Georgia, \"Times New Roman\", serif;\n    font-size: clamp(25px, 3vw, 34px);\n    font-weight: 500;\n    margin-bottom: 16px;\n  }\n\n  .thyroid_product h4 { font-size: 18px; margin-bottom: 10px; }\n  .thyroid_product p { margin: 0 0 16px; }\n\n  .thyroid_product ul {\n    margin: 8px 0 18px;\n    padding-left: 22px;\n  }\n\n  .thyroid_product li { margin-bottom: 7px; }\n\n  .thyroid_hero {\n    background: linear-gradient(135deg, var(--thyroid_cream), #fbf8f3);\n    border: 1px solid var(--thyroid_line);\n    border-radius: 22px;\n    margin-bottom: 28px;\n    padding: clamp(24px, 5vw, 52px);\n  }\n\n  .thyroid_eyebrow {\n    color: var(--thyroid_taupe_dark);\n    font-size: 13px;\n    font-weight: 700;\n    letter-spacing: 0.12em;\n    margin-bottom: 12px;\n    text-transform: uppercase;\n  }\n\n  .thyroid_lead {\n    font-size: 19px;\n    max-width: 900px;\n  }\n\n  .thyroid_notice,\n  .thyroid_warning {\n    background: var(--thyroid_white);\n    border-left: 5px solid var(--thyroid_taupe);\n    border-radius: 10px;\n    margin-top: 22px;\n    padding: 17px 19px;\n  }\n\n  .thyroid_warning {\n    background: var(--thyroid_red_bg);\n    border-color: var(--thyroid_red_text);\n    color: #672b2b;\n  }\n\n  .thyroid_grid,\n  .thyroid_steps,\n  .thyroid_method_grid,\n  .thyroid_trust_grid {\n    display: grid;\n    gap: 14px;\n    grid-template-columns: repeat(4, minmax(0, 1fr));\n    margin-top: 22px;\n  }\n\n  .thyroid_steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }\n\n  .thyroid_stat,\n  .thyroid_method_item,\n  .thyroid_trust_item,\n  .thyroid_step {\n    background: rgba(255, 255, 255, 0.84);\n    border: 1px solid var(--thyroid_line);\n    border-radius: 14px;\n    min-height: 112px;\n    padding: 17px;\n  }\n\n  .thyroid_method_item,\n  .thyroid_trust_item { background: #fbf8f3; }\n\n  .thyroid_stat strong,\n  .thyroid_method_item strong,\n  .thyroid_trust_item strong {\n    display: block;\n    font-size: 15px;\n    margin-bottom: 6px;\n  }\n\n  .thyroid_stat strong { font-size: 18px; }\n\n  .thyroid_stat span,\n  .thyroid_method_item span,\n  .thyroid_trust_item span {\n    color: var(--thyroid_muted);\n    font-size: 14px;\n    line-height: 1.55;\n  }\n\n  .thyroid_section {\n    background: var(--thyroid_white);\n    border: 1px solid var(--thyroid_line);\n    border-radius: 18px;\n    margin-bottom: 24px;\n    padding: clamp(22px, 4vw, 38px);\n  }\n\n  .thyroid_table_wrap {\n    overflow-x: auto;\n    width: 100%;\n  }\n\n  .thyroid_table {\n    border-collapse: collapse;\n    margin: 18px 0 4px;\n    min-width: 720px;\n    width: 100%;\n  }\n\n  .thyroid_table th,\n  .thyroid_table td {\n    border-bottom: 1px solid var(--thyroid_line);\n    padding: 15px 14px;\n    text-align: left;\n    vertical-align: top;\n  }\n\n  .thyroid_table th {\n    background: var(--thyroid_cream);\n    color: var(--thyroid_taupe_dark);\n    font-size: 13px;\n    letter-spacing: 0.04em;\n    text-transform: uppercase;\n  }\n\n  .thyroid_table tr:last-child td { border-bottom: 0; }\n  .thyroid_table td:first-child { width: 190px; }\n\n  .thyroid_status {\n    border: 1px solid currentColor;\n    border-radius: 999px;\n    display: inline-block;\n    font-size: 12px;\n    font-weight: 700;\n    line-height: 1.2;\n    padding: 6px 10px;\n    white-space: nowrap;\n  }\n\n  .thyroid_critical { background: var(--thyroid_red_bg); color: var(--thyroid_red_text); }\n  .thyroid_low { background: var(--thyroid_amber_bg); color: var(--thyroid_amber_text); }\n  .thyroid_normal { background: var(--thyroid_green_bg); color: var(--thyroid_green_text); }\n  .thyroid_high { background: var(--thyroid_orange_bg); color: var(--thyroid_orange_text); }\n  .thyroid_info { background: var(--thyroid_blue_bg); color: var(--thyroid_blue_text); }\n\n  .thyroid_step { background: var(--thyroid_cream); }\n\n  .thyroid_step_number {\n    align-items: center;\n    background: var(--thyroid_taupe_dark);\n    border-radius: 50%;\n    color: #ffffff;\n    display: inline-flex;\n    font-weight: 700;\n    height: 32px;\n    justify-content: center;\n    margin-bottom: 10px;\n    width: 32px;\n  }\n\n  .thyroid_biomarker {\n    border: 1px solid var(--thyroid_line);\n    border-radius: 14px;\n    margin-bottom: 14px;\n    overflow: hidden;\n  }\n\n  .thyroid_biomarker summary {\n    align-items: center;\n    background: var(--thyroid_cream);\n    color: var(--thyroid_ink);\n    cursor: pointer;\n    display: flex;\n    font-size: 18px;\n    font-weight: 700;\n    justify-content: space-between;\n    list-style: none;\n    padding: 18px 20px;\n  }\n\n  .thyroid_biomarker summary::-webkit-details-marker,\n  .thyroid_sources summary::-webkit-details-marker { display: none; }\n\n  .thyroid_biomarker summary::after,\n  .thyroid_sources summary::after {\n    color: var(--thyroid_taupe_dark);\n    content: \"+\";\n    font-size: 25px;\n    font-weight: 400;\n    line-height: 1;\n  }\n\n  .thyroid_biomarker[open] summary::after,\n  .thyroid_sources details[open] summary::after { content: \"−\"; }\n\n  .thyroid_biomarker_body { padding: 22px 20px 25px; }\n\n  .thyroid_subnote {\n    background: #fbf8f3;\n    border: 1px solid var(--thyroid_line);\n    border-radius: 11px;\n    margin: 18px 0;\n    padding: 15px 17px;\n  }\n\n  .thyroid_review_grid {\n    display: grid;\n    gap: 14px;\n    grid-template-columns: repeat(3, minmax(0, 1fr));\n    margin-top: 22px;\n  }\n\n  .thyroid_review_card {\n    background: #fbf8f3;\n    border: 1px solid var(--thyroid_line);\n    border-radius: 14px;\n    display: flex;\n    flex-direction: column;\n    min-height: 100%;\n    padding: 18px;\n  }\n\n  .thyroid_review_card_top {\n    align-items: center;\n    display: flex;\n    gap: 14px;\n    margin-bottom: 15px;\n  }\n\n  .thyroid_review_avatar {\n    aspect-ratio: 1 \/ 1 !important;\n    background-color: var(--thyroid_cream) !important;\n    background-repeat: no-repeat !important;\n    border: 1px solid var(--thyroid_line) !important;\n    border-radius: 999px !important;\n    box-shadow: 0 2px 8px rgba(47, 42, 40, 0.08) !important;\n    display: block !important;\n    flex: 0 0 92px !important;\n    height: 92px !important;\n    max-height: 92px !important;\n    max-width: 92px !important;\n    min-height: 92px !important;\n    min-width: 92px !important;\n    overflow: hidden !important;\n    width: 92px !important;\n  }\n\n  .thyroid_review_avatar_rimas {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/rimas_geiga.png?v=1785071125\") !important;\n    background-position: 50% 18% !important;\n    background-size: 118% auto !important;\n  }\n\n  .thyroid_review_avatar_snieguole {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Snieguole_Geige.jpg?v=1785070794\") !important;\n    background-position: 50% 15% !important;\n    background-size: 118% auto !important;\n  }\n\n  .thyroid_review_avatar_veronika {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Veronika_Matutyte_Doctor.jpg?v=1785075107\") !important;\n    background-position: 50% 18% !important;\n    background-size: 128% auto !important;\n  }\n\n  .thyroid_review_label {\n    color: var(--thyroid_taupe_dark);\n    display: block;\n    font-size: 11px;\n    font-weight: 700;\n    letter-spacing: 0.08em;\n    margin-bottom: 5px;\n    text-transform: uppercase;\n  }\n\n  .thyroid_review_name {\n    color: var(--thyroid_ink);\n    font-family: Georgia, \"Times New Roman\", serif;\n    font-size: 20px;\n    font-weight: 500;\n    line-height: 1.15;\n    margin: 0 0 5px;\n  }\n\n  .thyroid_review_title {\n    color: var(--thyroid_muted);\n    font-size: 13px;\n    line-height: 1.45;\n    margin: 0;\n  }\n\n  .thyroid_review_scope {\n    font-size: 14px;\n    line-height: 1.6;\n    margin-bottom: 16px;\n  }\n\n  .thyroid_review_link,\n  .thyroid_board_link a,\n  .thyroid_sources a {\n    color: var(--thyroid_taupe_dark);\n    font-weight: 700;\n    text-decoration: underline;\n    text-decoration-thickness: 1px;\n    text-underline-offset: 4px;\n  }\n\n  .thyroid_review_link {\n    font-size: 13px;\n    margin-top: auto;\n  }\n\n  .thyroid_review_meta {\n    background: var(--thyroid_cream);\n    border-radius: 12px;\n    display: grid;\n    gap: 12px;\n    grid-template-columns: repeat(3, minmax(0, 1fr));\n    margin-top: 20px;\n    padding: 17px 18px;\n  }\n\n  .thyroid_review_meta strong {\n    display: block;\n    font-size: 13px;\n    margin-bottom: 3px;\n  }\n\n  .thyroid_review_meta span {\n    color: var(--thyroid_muted);\n    font-size: 13px;\n  }\n\n  .thyroid_board_link {\n    border-top: 1px solid var(--thyroid_line);\n    margin-top: 18px;\n    padding-top: 16px;\n  }\n\n  .thyroid_sources details {\n    border: 1px solid var(--thyroid_line);\n    border-radius: 12px;\n    overflow: hidden;\n  }\n\n  .thyroid_sources summary {\n    align-items: center;\n    background: var(--thyroid_cream);\n    cursor: pointer;\n    display: flex;\n    font-weight: 700;\n    justify-content: space-between;\n    list-style: none;\n    padding: 16px 18px;\n  }\n\n  .thyroid_sources_body { padding: 18px; }\n\n  .thyroid_faq details {\n    border-bottom: 1px solid var(--thyroid_line);\n    padding: 14px 0;\n  }\n\n  .thyroid_faq details:last-child { border-bottom: 0; }\n\n  .thyroid_faq summary {\n    cursor: pointer;\n    font-weight: 700;\n  }\n\n  .thyroid_faq details p { margin-top: 12px; }\n\n  .thyroid_footer_note {\n    background: var(--thyroid_taupe_dark);\n    border-radius: 16px;\n    color: #ffffff;\n    padding: 24px;\n  }\n\n  .thyroid_footer_note h3,\n  .thyroid_footer_note strong { color: #ffffff; }\n\n  @media (max-width: 900px) {\n    .thyroid_grid,\n    .thyroid_method_grid,\n    .thyroid_trust_grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }\n\n    .thyroid_steps,\n    .thyroid_review_grid { grid-template-columns: 1fr; }\n\n    .thyroid_review_meta { grid-template-columns: 1fr; }\n  }\n\n  @media (max-width: 540px) {\n    .thyroid_grid,\n    .thyroid_method_grid,\n    .thyroid_trust_grid { grid-template-columns: 1fr; }\n\n    .thyroid_product { font-size: 15px; }\n\n    .thyroid_biomarker summary {\n      font-size: 16px;\n      padding: 16px;\n    }\n\n    .thyroid_biomarker_body { padding: 18px 15px 21px; }\n\n    .thyroid_review_avatar {\n      flex-basis: 78px !important;\n      height: 78px !important;\n      max-height: 78px !important;\n      max-width: 78px !important;\n      min-height: 78px !important;\n      min-width: 78px !important;\n      width: 78px !important;\n    }\n  }\n\n  .thyroid_review_avatar_laura {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/5W4A9892.jpg?v=1785070092\") !important;\n    background-position: 50% 15% !important;\n    background-size: 132% auto !important;\n  }\n\n  .thyroid_review_avatar_rimas {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/rimas_geiga.png?v=1785071125\") !important;\n    background-position: 50% 18% !important;\n    background-size: 118% auto !important;\n  }\n\n  .thyroid_review_avatar_veronika {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Veronika_Matutyte_Doctor.jpg?v=1785075107\") !important;\n    background-position: 50% 18% !important;\n    background-size: 128% auto !important;\n  }\n\n  .thyroid_review_avatar_giedre {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Giedre_Narkiene.png?v=1785071017\") !important;\n    background-position: 50% 18% !important;\n    background-size: 132% auto !important;\n  }\n\n  .thyroid_review_avatar_rimas {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/rimas_geiga.png?v=1785071125\") !important;\n    background-position: 50% 18% !important;\n    background-size: 118% auto !important;\n  }\n\n  .thyroid_review_avatar_veronika {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Veronika_Matutyte_Doctor.jpg?v=1785075107\") !important;\n    background-position: 50% 18% !important;\n    background-size: 128% auto !important;\n  }\n\n  .thyroid_review_avatar_rimas {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/rimas_geiga.png?v=1785071125\") !important;\n    background-position: 50% 18% !important;\n    background-size: 118% auto !important;\n  }\n\n  .thyroid_review_avatar_veronika {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Veronika_Matutyte_Doctor.jpg?v=1785075107\") !important;\n    background-position: 50% 18% !important;\n    background-size: 128% auto !important;\n  }\n\n  .thyroid_review_avatar_laura {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/5W4A9892.jpg?v=1785070092\") !important;\n    background-position: 50% 15% !important;\n    background-size: 132% auto !important;\n  }\n\n  .thyroid_review_avatar_snieguole {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Snieguole_Geige.jpg?v=1785070794\") !important;\n    background-position: 50% 15% !important;\n    background-size: 118% auto !important;\n  }\n\n  .thyroid_review_avatar_rimas {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/rimas_geiga.png?v=1785071125\") !important;\n    background-position: 50% 18% !important;\n    background-size: 118% auto !important;\n  }\n\n  .thyroid_review_avatar_veronika {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Veronika_Matutyte_Doctor.jpg?v=1785075107\") !important;\n    background-position: 50% 18% !important;\n    background-size: 128% auto !important;\n  }\n\n  .thyroid_review_avatar_veronika {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Veronika_Matutyte_Doctor.jpg?v=1785075107\") !important;\n    background-position: 50% 18% !important;\n    background-size: 128% auto !important;\n  }\n\n  .thyroid_review_avatar_snieguole {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Snieguole_Geige.jpg?v=1785070794\") !important;\n    background-position: 50% 15% !important;\n    background-size: 118% auto !important;\n  }\n\n  .thyroid_review_avatar_giedre {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Giedre_Narkiene.png?v=1785071017\") !important;\n    background-position: 50% 18% !important;\n    background-size: 132% auto !important;\n  }\n\u003c\/style\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003carticle class=\"thyroid_product\"\u003e\n\u003csection class=\"thyroid_hero\"\u003e\n\u003cp class=\"thyroid_eyebrow\"\u003eAt home thyroid function blood test\u003c\/p\u003e\n\u003ch2\u003eHome Thyroid Test Kit UK | TSH, T3 \u0026amp; T4 Blood Test\u003c\/h2\u003e\n\u003cp class=\"thyroid_lead\"\u003e\u003cstrong\u003eA three marker home blood test measuring TSH, free T4 and free T3 through a UK laboratory pathway.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe panel provides information about the pituitary and thyroid hormone feedback system. It may support assessment of underactive or overactive thyroid patterns and treatment monitoring, but it cannot identify every cause or replace clinical diagnosis.\u003c\/p\u003e\n\u003cdiv class=\"thyroid_grid\"\u003e\n\u003cdiv class=\"thyroid_stat\"\u003e\n\u003cstrong\u003e3 biomarkers\u003c\/strong\u003e\u003cspan\u003eTSH, free T4 and free T3\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_stat\"\u003e\n\u003cstrong\u003eHome collection\u003c\/strong\u003e\u003cspan\u003eCapillary blood collected into the supplied microtainer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_stat\"\u003e\n\u003cstrong\u003eUK laboratory pathway\u003c\/strong\u003e\u003cspan\u003eUKAS accredited and CQC registered laboratory processing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_stat\"\u003e\n\u003cstrong\u003eProduct code\u003c\/strong\u003e\u003cspan\u003eC1BLP02800\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_notice\"\u003e\n\u003cstrong\u003eThyroid function panel, not a complete thyroid investigation\u003c\/strong\u003e\n\u003cp\u003eThis product does not include thyroid peroxidase antibodies, thyroglobulin antibodies, TSH receptor antibodies, reverse T3, thyroid ultrasound or examination of a neck lump.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_warning\"\u003e\n\u003cstrong\u003eUrgent symptoms should not wait for a home test\u003c\/strong\u003e\n\u003cp\u003eSeek urgent help for chest pain, severe breathlessness, collapse, a very fast or irregular heartbeat, confusion, fever with severe agitation, or new neck swelling that affects breathing or swallowing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_section\"\u003e\n\u003cp class=\"thyroid_eyebrow\"\u003eQuality and compliance\u003c\/p\u003e\n\u003ch3\u003eHome thyroid testing supported by UK standards\u003c\/h3\u003e\n\u003cdiv class=\"thyroid_trust_grid\"\u003e\n\u003cdiv class=\"thyroid_trust_item\"\u003e\n\u003cstrong\u003eUKAS accredited laboratories\u003c\/strong\u003e \u003cspan\u003eISO 15189 accreditation supports laboratory competence, quality systems and diagnostic performance.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_trust_item\"\u003e\n\u003cstrong\u003eCQC registered services\u003c\/strong\u003e \u003cspan\u003eThe diagnostic pathway uses organisations registered with the Care Quality Commission.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_trust_item\"\u003e\n\u003cstrong\u003eCompliant collection equipment\u003c\/strong\u003e \u003cspan\u003eUKCA and CE marked equipment supported by an ISO 13485 quality management framework.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_trust_item\"\u003e\n\u003cstrong\u003eClinically bounded claims\u003c\/strong\u003e \u003cspan\u003eMedicine timing, pregnancy, illness, biotin interference and urgent symptom limits are made explicit.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_section\"\u003e\n\u003ch3\u003eWhat this thyroid function panel measures\u003c\/h3\u003e\n\u003cdiv class=\"thyroid_table_wrap\"\u003e\n\u003ctable class=\"thyroid_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eMarker\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eRole\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eClinical context\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTSH\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePituitary signal controlling thyroid hormone production\u003c\/td\u003e\n\u003ctd\u003eThe usual first marker for suspected primary thyroid dysfunction.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFree T4\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnbound circulating thyroxine\u003c\/td\u003e\n\u003ctd\u003eHelps distinguish overt and subclinical patterns and assess treatment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFree T3\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnbound circulating triiodothyronine\u003c\/td\u003e\n\u003ctd\u003eParticularly useful where TSH is low or hyperthyroidism is suspected.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_section\"\u003e\n\u003ch3\u003eWho may consider this test?\u003c\/h3\u003e\n\u003cp\u003eThis home thyroid test kit may be considered by adults seeking selected thyroid hormone information in the context of:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePersistent tiredness, feeling cold, constipation or unexplained weight change\u003c\/li\u003e\n\u003cli\u003ePalpitations, tremor, heat intolerance, sweating or unexplained weight loss\u003c\/li\u003e\n\u003cli\u003eHair, skin or menstrual changes alongside clinical assessment\u003c\/li\u003e\n\u003cli\u003eA family or personal history of thyroid disease\u003c\/li\u003e\n\u003cli\u003eAn earlier abnormal or borderline thyroid result\u003c\/li\u003e\n\u003cli\u003eClinician directed monitoring of levothyroxine, liothyronine or antithyroid treatment\u003c\/li\u003e\n\u003cli\u003ePregnancy planning or pregnancy where clinical guidance has already been arranged\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese symptoms are non specific and can have many causes not measured by this panel.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_section\"\u003e\n\u003ch3\u003eCommon thyroid function patterns\u003c\/h3\u003e\n\u003cp\u003eThese patterns support interpretation but do not establish the underlying cause.\u003c\/p\u003e\n\u003cdiv class=\"thyroid_table_wrap\"\u003e\n\u003ctable class=\"thyroid_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eTSH\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eFree T4 or free T3 pattern\u003c\/th\u003e\n\u003cth scope=\"col\"\u003ePossible interpretation\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLow free T4\u003c\/td\u003e\n\u003ctd\u003eCommonly supports overt primary hypothyroidism.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNormal free T4\u003c\/td\u003e\n\u003ctd\u003eMay indicate subclinical hypothyroidism and often requires repeat testing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLow\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh free T4 or free T3\u003c\/td\u003e\n\u003ctd\u003eMay support hyperthyroidism or excessive thyroid hormone treatment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLow\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNormal free T4 and free T3\u003c\/td\u003e\n\u003ctd\u003eMay indicate subclinical hyperthyroidism, medicine effects, pregnancy or illness.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLow or normal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLow free T4\u003c\/td\u003e\n\u003ctd\u003eMay suggest central hypothyroidism, severe illness, medicine effects or assay interference.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiscordant\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eResults do not fit a usual pattern\u003c\/td\u003e\n\u003ctd\u003eConsider medicine timing, biotin, pregnancy, illness, analytical interference or uncommon pituitary conditions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_section\"\u003e\n\u003ch3\u003eHow the home thyroid test kit works\u003c\/h3\u003e\n\u003cdiv class=\"thyroid_steps\"\u003e\n\u003cdiv class=\"thyroid_step\"\u003e\n\u003cspan class=\"thyroid_step_number\"\u003e1\u003c\/span\u003e\n\u003ch4\u003eReview preparation\u003c\/h4\u003e\n\u003cp\u003eRecord medicines, supplements, recent illness, pregnancy status and thyroid treatment timing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_step\"\u003e\n\u003cspan class=\"thyroid_step_number\"\u003e2\u003c\/span\u003e\n\u003ch4\u003eCollect and return\u003c\/h4\u003e\n\u003cp\u003eCollect capillary blood into the supplied microtainer and return it using the provided packaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_step\"\u003e\n\u003cspan class=\"thyroid_step_number\"\u003e3\u003c\/span\u003e\n\u003ch4\u003eReview the complete pattern\u003c\/h4\u003e\n\u003cp\u003eInterpret TSH, free T4 and free T3 together with symptoms and the laboratory reference intervals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_section\"\u003e\n\u003ch3\u003ePreparing for the test\u003c\/h3\u003e\n\u003cdiv class=\"thyroid_table_wrap\"\u003e\n\u003ctable class=\"thyroid_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePreparation\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFasting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFasting is not usually required for this panel. Follow the supplied kit instructions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThyroid medicines\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eContinue prescribed treatment unless advised otherwise. Record the product, dose and time of the most recent dose.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBiotin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBiotin is vitamin B7 and can interfere with some thyroid assays. Ask the laboratory or a clinician whether it should be paused.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther medicines\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord amiodarone, lithium, glucocorticoids, anticonvulsants, oestrogen, fertility treatment and antithyroid medicines.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecent illness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAcute illness may temporarily alter thyroid results. Delay non urgent routine testing until recovered where practical.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePregnancy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord pregnancy, trimester and recent birth because specialist reference intervals and follow up may be required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRepeat comparisons\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUse similar collection timing and medicine timing when comparing results over time.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_section\"\u003e\n\u003ch3\u003eBiomarkers and result interpretation\u003c\/h3\u003e\n\u003cp\u003eSelect each marker to read what it measures, preparation guidance and how low, normal, high or urgent results may be considered.\u003c\/p\u003e\n\u003cdetails class=\"thyroid_biomarker\"\u003e\n\u003csummary\u003eFree triiodothyronine (free T3)\u003c\/summary\u003e\n\u003cdiv class=\"thyroid_biomarker_body\"\u003e\n\u003cp\u003eFree T3 is the unbound fraction of triiodothyronine in the blood. T3 is the more biologically active thyroid hormone, and much of it is produced outside the thyroid through conversion from T4.\u003c\/p\u003e\n\u003cp\u003eFree T3 is particularly useful when TSH is suppressed and hyperthyroidism is suspected. A low free T3 result by itself is not a reliable diagnosis of hypothyroidism because illness, calorie restriction and medicines can lower T3.\u003c\/p\u003e\n\u003cdiv class=\"thyroid_subnote\"\u003e\n\u003cstrong\u003eImportant limitation\u003c\/strong\u003e\n\u003cp\u003eFree T3 is not usually the main marker for diagnosing or monitoring primary hypothyroidism. TSH and free T4 are generally more informative.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFasting is not usually required. Record levothyroxine, liothyronine, antithyroid medicines, amiodarone, lithium, glucocorticoids, anticonvulsants, oestrogen treatment, pregnancy status, high dose biotin and the timing of the most recent thyroid medicine dose. Do not stop prescribed treatment yourself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"thyroid_table_wrap\"\u003e\n\u003ctable class=\"thyroid_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very low result may occur during severe illness, advanced hypothyroidism, medicine effects or analytical problems.\u003c\/td\u003e\n\u003ctd\u003eFollow the laboratory escalation advice and arrange prompt clinical review.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur with non thyroidal illness, calorie restriction, medicines, hypothyroid patterns or treatment factors.\u003c\/td\u003e\n\u003ctd\u003eInterpret with TSH, free T4, symptoms and recent illness.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFalls within the laboratory interval.\u003c\/td\u003e\n\u003ctd\u003eA normal free T3 does not exclude early hypothyroidism, structural thyroid disease or autoimmune thyroid disease.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur with hyperthyroidism, T3 predominant thyrotoxicosis or liothyronine treatment.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result with a GP and review TSH, free T4, medicines and symptoms.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA markedly raised result with severe symptoms may indicate significant thyrotoxicosis.\u003c\/td\u003e\n\u003ctd\u003eSeek urgent clinical assessment, especially with a fast heartbeat, chest pain, breathlessness, fever, agitation or confusion.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"thyroid_biomarker\"\u003e\n\u003csummary\u003eThyroid stimulating hormone (TSH)\u003c\/summary\u003e\n\u003cdiv class=\"thyroid_biomarker_body\"\u003e\n\u003cp\u003eTSH is produced by the pituitary gland and signals the thyroid to produce thyroid hormones. It is usually the first laboratory marker used when primary thyroid dysfunction is suspected.\u003c\/p\u003e\n\u003cp\u003eTSH must be interpreted with free T4 and, when TSH is low or hyperthyroidism is suspected, free T3. Pregnancy, medicines, illness and pituitary conditions can alter the pattern.\u003c\/p\u003e\n\u003cdiv class=\"thyroid_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFasting is not usually required. Record levothyroxine, liothyronine, antithyroid medicines, amiodarone, lithium, glucocorticoids, anticonvulsants, oestrogen treatment, pregnancy status, high dose biotin and the timing of the most recent thyroid medicine dose. Do not stop prescribed treatment yourself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"thyroid_table_wrap\"\u003e\n\u003ctable class=\"thyroid_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA markedly suppressed TSH may occur with overt hyperthyroidism, excessive thyroid hormone treatment, pregnancy, severe illness or medicine effects.\u003c\/td\u003e\n\u003ctd\u003eArrange prompt clinical review, particularly when free T4 or free T3 is raised.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur with hyperthyroidism, subclinical hyperthyroidism, thyroid hormone treatment, pregnancy, illness, medicines or pituitary dysfunction.\u003c\/td\u003e\n\u003ctd\u003eReview free T4, free T3, symptoms and treatment timing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFalls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eA normal TSH reduces the likelihood of primary overt thyroid dysfunction but does not assess nodules, antibodies or every pituitary condition.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eCommonly occurs when the thyroid is underactive, especially when free T4 is low. It may also reflect medicine timing, adherence, recovery from illness or pregnancy requirements.\u003c\/td\u003e\n\u003ctd\u003eDiscuss repeat testing, symptoms, free T4 and treatment with a GP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA markedly raised TSH may indicate significant untreated hypothyroidism or inadequate replacement, although interpretation depends on free T4 and clinical status.\u003c\/td\u003e\n\u003ctd\u003eArrange prompt medical review and follow the laboratory escalation advice.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"thyroid_biomarker\"\u003e\n\u003csummary\u003eFree thyroxine (free T4)\u003c\/summary\u003e\n\u003cdiv class=\"thyroid_biomarker_body\"\u003e\n\u003cp\u003eFree T4 is the unbound fraction of thyroxine circulating in the blood. T4 is produced mainly by the thyroid and can be converted into the more active hormone T3 in tissues.\u003c\/p\u003e\n\u003cp\u003eFree T4 helps distinguish overt from subclinical thyroid dysfunction and is important when TSH is abnormal, pituitary disease is suspected, pregnancy is present or thyroid treatment is being monitored.\u003c\/p\u003e\n\u003cdiv class=\"thyroid_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFasting is not usually required. Record levothyroxine, liothyronine, antithyroid medicines, amiodarone, lithium, glucocorticoids, anticonvulsants, oestrogen treatment, pregnancy status, high dose biotin and the timing of the most recent thyroid medicine dose. Do not stop prescribed treatment yourself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"thyroid_table_wrap\"\u003e\n\u003ctable class=\"thyroid_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very low result may occur with significant primary hypothyroidism, central hypothyroidism, severe illness or treatment effects.\u003c\/td\u003e\n\u003ctd\u003eArrange prompt clinical review, especially with drowsiness, confusion, hypothermia, severe weakness or breathing problems.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eWith high TSH, this commonly supports primary hypothyroidism. With low or normal TSH, central hypothyroidism, illness, medicine effects or assay issues may need consideration.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the complete pattern with a GP and do not adjust treatment alone.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFalls within the laboratory interval.\u003c\/td\u003e\n\u003ctd\u003eInterpret with TSH, symptoms, treatment, pregnancy status and previous results.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eWith low TSH, this may support hyperthyroidism or excessive thyroid hormone treatment. Discordant patterns can arise from medicines, biotin, pregnancy or assay interference.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the pattern and medicine timing with a clinician.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"thyroid_status thyroid_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA markedly raised result with severe symptoms may indicate significant thyrotoxicosis.\u003c\/td\u003e\n\u003ctd\u003eSeek urgent clinical assessment, particularly with chest pain, a very fast heartbeat, severe breathlessness, fever, agitation or confusion.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_section\"\u003e\n\u003ch3\u003eWhat this test does not include\u003c\/h3\u003e\n\u003cdiv class=\"thyroid_table_wrap\"\u003e\n\u003ctable class=\"thyroid_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eNot included\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhy it may matter\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThyroid peroxidase antibodies\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay support assessment of Hashimoto's thyroiditis and future hypothyroidism risk.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTSH receptor antibodies\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay support investigation of Graves' disease.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThyroglobulin antibodies\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay be used in selected autoimmune or thyroid cancer monitoring contexts.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThyroid ultrasound\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRequired to assess nodules, enlargement and structural thyroid changes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePituitary hormone testing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay be required where free T4 is low despite a low or normal TSH.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClinical examination\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eImportant where there is a neck lump, swelling, swallowing difficulty, eye symptoms or marked heart rate changes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection id=\"content-standards\" class=\"thyroid_section\"\u003e\n\u003cp class=\"thyroid_eyebrow\"\u003eEvidence and content standards\u003c\/p\u003e\n\u003ch3\u003eHow this product information was prepared\u003c\/h3\u003e\n\u003cp\u003eThis page was prepared from the supplied three marker thyroid function test specification and checked against current NICE, NHS, MHRA, UKAS and CQC information on TSH, free T4, free T3, biotin interference, acute illness, pregnancy and treatment monitoring.\u003c\/p\u003e\n\u003cdiv class=\"thyroid_method_grid\"\u003e\n\u003cdiv class=\"thyroid_method_item\"\u003e\n\u003cstrong\u003eProduct specification checked\u003c\/strong\u003e \u003cspan\u003eAt home format, capillary specimen, three biomarkers, preparation guidance and product code.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_method_item\"\u003e\n\u003cstrong\u003eUK clinical evidence checked\u003c\/strong\u003e \u003cspan\u003eNICE and NHS sources used for test selection, result patterns, medicines and clinical limitations.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_method_item\"\u003e\n\u003cstrong\u003eErrors corrected\u003c\/strong\u003e \u003cspan\u003eBiotin is identified correctly as vitamin B7, and free T3 is not presented as a standalone hypothyroidism diagnosis.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_method_item\"\u003e\n\u003cstrong\u003eReview cycle\u003c\/strong\u003e \u003cspan\u003eReview at least annually and earlier when thyroid guidance, laboratory methods or medicine safety advice changes.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection id=\"medical-review\" class=\"thyroid_section\"\u003e\n\u003cp class=\"thyroid_eyebrow\"\u003eClinical accountability\u003c\/p\u003e\n\u003ch3\u003eDiagnostic logic, patient safety and symptom context review\u003c\/h3\u003e\n\u003cp\u003eThe review roles are separated across thyroid test logic, patient safety and clinically relevant skin and hair manifestations. The reviewers are not presented as consultant endocrinologists.\u003c\/p\u003e\n\u003cdiv class=\"thyroid_review_grid\"\u003e\n\u003carticle class=\"thyroid_review_card\"\u003e\n\u003cdiv class=\"thyroid_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"thyroid_review_avatar thyroid_review_avatar_veronika\" aria-label=\"Portrait of Veronika Matutyte\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"thyroid_review_label\"\u003eDiagnostic logic and laboratory pathway reviewed by\u003c\/span\u003e\n\u003ch4 class=\"thyroid_review_name\"\u003eVeronika Matutyte\u003c\/h4\u003e\n\u003cp class=\"thyroid_review_title\"\u003eMedical Doctor and Healthcare Management Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"thyroid_review_scope\"\u003eReviewed TSH, free T4 and free T3 pattern logic, biotin interference, pregnancy safeguards, repeat testing and laboratory governance.\u003c\/p\u003e\n\u003ca href=\"\/pages\/veronika-matutyte-medical-doctor-and-healthcare-management-expert\" class=\"thyroid_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003carticle class=\"thyroid_review_card\"\u003e\n\u003cdiv class=\"thyroid_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"thyroid_review_avatar thyroid_review_avatar_snieguole\" aria-label=\"Portrait of Dr Snieguole Geige\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"thyroid_review_label\"\u003eMedical safety and treatment limitations reviewed by\u003c\/span\u003e\n\u003ch4 class=\"thyroid_review_name\"\u003eDr Snieguole Geige\u003c\/h4\u003e\n\u003cp class=\"thyroid_review_title\"\u003eDentist, Medical Doctor and Senior Adviser\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"thyroid_review_scope\"\u003eReviewed urgent symptom guidance, medicine continuity, monitoring boundaries and the distinction between home testing and diagnosis.\u003c\/p\u003e\n\u003ca href=\"\/pages\/dr-snieguole-geige-dentist-medical-doctor-and-senior-adviser\" class=\"thyroid_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003carticle class=\"thyroid_review_card\"\u003e\n\u003cdiv class=\"thyroid_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"thyroid_review_avatar thyroid_review_avatar_giedre\" aria-label=\"Portrait of Dr Giedre Narkiene\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"thyroid_review_label\"\u003eSkin, hair and patient symptom context reviewed by\u003c\/span\u003e\n\u003ch4 class=\"thyroid_review_name\"\u003eDr Giedre Narkiene\u003c\/h4\u003e\n\u003cp class=\"thyroid_review_title\"\u003eMedical Doctor and Board Certified Dermatologist\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"thyroid_review_scope\"\u003eReviewed responsible discussion of hair, skin and nail changes, symptom non specificity and the need for wider clinical assessment.\u003c\/p\u003e\n\u003ca href=\"\/pages\/dr-giedre-narkiene-medical-doctor-and-board-certified-dermatologist\" class=\"thyroid_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"thyroid_review_meta\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEvidence checked\u003c\/strong\u003e \u003cspan\u003e26 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eClinical review date\u003c\/strong\u003e \u003cspan\u003e26 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eNext scheduled review\u003c\/strong\u003e \u003cspan\u003eBy 26 July 2027 or earlier when UK guidance changes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"thyroid_board_link\"\u003e\u003ca href=\"\/pages\/medical-advisory-board\"\u003eMeet the Grace Belgravia Medical Advisory Board\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_section thyroid_sources\"\u003e\n\u003cp class=\"thyroid_eyebrow\"\u003eAuthoritative references\u003c\/p\u003e\n\u003ch3\u003eUK thyroid testing and laboratory sources\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003eView the evidence sources used\u003c\/summary\u003e\n\u003cdiv class=\"thyroid_sources_body\"\u003e\n\u003cul\u003e\n\u003cli\u003eNICE guideline NG145: Thyroid disease, assessment and management\u003c\/li\u003e\n\u003cli\u003eNICE Clinical Knowledge Summaries: hypothyroidism and hyperthyroidism assessment\u003c\/li\u003e\n\u003cli\u003eGloucestershire Hospitals NHS: thyroid function tests, TSH, free T4 and free T3\u003c\/li\u003e\n\u003cli\u003eNHS information on underactive and overactive thyroid conditions\u003c\/li\u003e\n\u003cli\u003eMHRA safety guidance on biotin interference with thyroid laboratory tests\u003c\/li\u003e\n\u003cli\u003eUKAS ISO 15189 medical laboratory accreditation information\u003c\/li\u003e\n\u003cli\u003eCQC guidance on diagnostic and screening procedures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_section thyroid_faq\"\u003e\n\u003cp class=\"thyroid_eyebrow\"\u003eSearch led questions\u003c\/p\u003e\n\u003ch3\u003eHome thyroid test kit FAQs\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I take a thyroid blood test at home?\u003c\/summary\u003e\n\u003cp\u003eYes. This kit uses capillary blood collected at home and returned for laboratory analysis. It measures TSH, free T4 and free T3, but the result must be interpreted with symptoms, medicines, pregnancy status, recent illness and previous results.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does a thyroid function test measure?\u003c\/summary\u003e\n\u003cp\u003eThis panel measures thyroid stimulating hormone, free thyroxine and free triiodothyronine. Together they provide information about the pituitary and thyroid hormone feedback system.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs TSH enough to check thyroid function?\u003c\/summary\u003e\n\u003cp\u003eTSH is the usual first test for suspected primary thyroid dysfunction. Free T4 is particularly important when TSH is high, while free T4 and free T3 are useful when TSH is low or hyperthyroidism is suspected.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this test diagnose an underactive thyroid?\u003c\/summary\u003e\n\u003cp\u003eNo single home result should be treated as a diagnosis. A high TSH with low free T4 commonly supports primary hypothyroidism, while a high TSH with normal free T4 may indicate subclinical hypothyroidism and often requires repeat testing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this test diagnose an overactive thyroid?\u003c\/summary\u003e\n\u003cp\u003eA low TSH with raised free T4 or free T3 may support hyperthyroidism or thyrotoxicosis, but the cause requires clinical assessment and may involve antibody testing, examination, imaging or other investigations.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to fast for a thyroid blood test?\u003c\/summary\u003e\n\u003cp\u003eFasting is not usually required for TSH, free T4 or free T3 alone. Follow the kit instructions and use similar collection conditions when comparing results over time.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the best time to take a thyroid test?\u003c\/summary\u003e\n\u003cp\u003eThyroid tests can usually be collected at a convenient time, but consistency matters for monitoring. If you take levothyroxine or liothyronine, record the dose and time taken because recent dosing can affect free hormone results.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I take levothyroxine before the blood test?\u003c\/summary\u003e\n\u003cp\u003eContinue prescribed treatment unless your clinician gives different instructions. Record when the dose was taken. Some clinicians prefer testing before the morning dose or under the same timing conditions for each repeat result.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan liothyronine affect free T3 results?\u003c\/summary\u003e\n\u003cp\u003eYes. Free T3 may rise after a liothyronine dose, so the collection time in relation to the dose is important. Follow the prescribing clinician's requested timing and do not stop treatment yourself.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan biotin affect thyroid blood test results?\u003c\/summary\u003e\n\u003cp\u003eYes. High biotin intake from supplements can cause falsely high or falsely low thyroid results in some laboratory methods. Biotin is vitamin B7, not vitamin B9. Ask the laboratory or a clinician whether it should be paused.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I delay thyroid testing after an illness?\u003c\/summary\u003e\n\u003cp\u003eAcute illness can temporarily alter thyroid results, sometimes called non thyroidal illness. Routine testing may be delayed until recovery unless thyroid dysfunction is suspected as part of the acute illness or urgent clinical assessment is needed.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan pregnancy affect thyroid test results?\u003c\/summary\u003e\n\u003cp\u003eYes. Pregnancy changes thyroid physiology and requires trimester and laboratory specific reference intervals. People who are pregnant, trying to conceive or recently postpartum should discuss results promptly with their GP, midwife or specialist.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does a high TSH result mean?\u003c\/summary\u003e\n\u003cp\u003eA high TSH commonly occurs when the thyroid is underactive, particularly when free T4 is low. It can also be influenced by medicine adherence or timing, recovery from illness, pregnancy requirements and less common pituitary or assay factors.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does a low TSH result mean?\u003c\/summary\u003e\n\u003cp\u003eA low TSH may occur with an overactive thyroid, excessive thyroid hormone treatment, pregnancy, acute illness, medicines or pituitary conditions. Free T4 and free T3 help interpret the pattern.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does a low free T4 result mean?\u003c\/summary\u003e\n\u003cp\u003eLow free T4 with high TSH commonly supports primary hypothyroidism. Low free T4 with a low or normal TSH can suggest central hypothyroidism, severe illness, medicine effects or assay interference and needs clinical review.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does a high free T4 result mean?\u003c\/summary\u003e\n\u003cp\u003eHigh free T4 with low TSH may support hyperthyroidism or excessive thyroid hormone treatment. A discordant pattern can occur with medicines, biotin, assay interference, pregnancy or rare pituitary conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does free T3 add to the panel?\u003c\/summary\u003e\n\u003cp\u003eFree T3 can help when hyperthyroidism is suspected because some people have raised T3 before free T4 rises. A low free T3 alone is not a reliable diagnosis of hypothyroidism and commonly occurs during illness.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan normal thyroid results rule out every thyroid problem?\u003c\/summary\u003e\n\u003cp\u003eNo. Normal results reduce the likelihood of overt thyroid dysfunction but do not assess thyroid nodules, structural disease, thyroid cancer or every autoimmune condition. Persistent symptoms still require clinical assessment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this test check for Hashimoto's disease?\u003c\/summary\u003e\n\u003cp\u003eNo. The panel does not include thyroid peroxidase or thyroglobulin antibodies. Antibody testing may be requested where autoimmune thyroid disease is suspected.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this test check for Graves' disease?\u003c\/summary\u003e\n\u003cp\u003eNo. TSH, free T4 and free T3 can show a hyperthyroid pattern, but Graves' disease may require TSH receptor antibody testing and clinical assessment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan this test monitor thyroid medication?\u003c\/summary\u003e\n\u003cp\u003eIt may provide useful information, but monitoring depends on the medicine, dose, treatment duration, symptoms, pregnancy status and collection timing. Dose changes should be made only by the prescribing clinician.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow often should thyroid function be tested?\u003c\/summary\u003e\n\u003cp\u003eThe interval depends on the clinical question. After a medicine change, clinicians often wait several weeks before retesting. Stable treated hypothyroidism is commonly monitored periodically, often annually, unless symptoms or circumstances change.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen are thyroid symptoms urgent?\u003c\/summary\u003e\n\u003cp\u003eSeek urgent help for chest pain, severe breathlessness, collapse, a very fast or irregular heartbeat, confusion, fever with severe agitation, or new neck swelling that affects breathing or swallowing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre the laboratories UKAS accredited and CQC registered?\u003c\/summary\u003e\n\u003cp\u003eSamples are processed through UKAS accredited laboratories within a CQC registered diagnostic pathway. Collection equipment is UKCA and CE marked and supported by an ISO 13485 quality management framework.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"thyroid_footer_note\"\u003e\n\u003ch3\u003eMedical guidance\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis panel provides thyroid function information and is not a standalone diagnosis.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeek urgent help for chest pain, severe breathlessness, collapse, a very fast or irregular heartbeat, confusion, fever with severe agitation, or new neck swelling that affects breathing or swallowing.\u003c\/p\u003e\n\u003cp\u003eContinue prescribed thyroid medicine unless a clinician advises otherwise. Do not change levothyroxine, liothyronine or antithyroid treatment from a home result alone.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/article\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":54410153263443,"sku":"479-thyroid-function-tes","price":89.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Thyroid_Test_Kit_UK_-_TSH_T3_T4_Blood_Test.png?v=1785167812"},{"product_id":"blood-iron-test","title":"Home Iron Blood Test UK - Ferritin \u0026 Iron Profile","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cmeta content=\"width=device-width, initial-scale=1\" name=\"viewport\"\u003e\u003cmeta content=\"Order a home iron blood test in the UK. UKAS accredited and CQC registered labs check ferritin, iron, transferrin, TIBC and transferrin saturation.\" name=\"description\"\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  .iron_product {\n    --iron_ink: #2f2a28;\n    --iron_muted: #6f625d;\n    --iron_taupe: #786863;\n    --iron_taupe_dark: #5e4c46;\n    --iron_cream: #f5eee3;\n    --iron_line: #ded2c5;\n    --iron_white: #ffffff;\n    --iron_green_bg: #e8f3e9;\n    --iron_green_text: #345f3f;\n    --iron_amber_bg: #fff1cf;\n    --iron_amber_text: #7b5715;\n    --iron_orange_bg: #f9e7d7;\n    --iron_orange_text: #8a4d2d;\n    --iron_red_bg: #f8dfdf;\n    --iron_red_text: #8f3535;\n    --iron_blue_bg: #e8eef4;\n    --iron_blue_text: #405c72;\n    color: var(--iron_ink);\n    font-family: inherit;\n    font-size: 16px;\n    line-height: 1.7;\n    margin: 0 auto;\n    max-width: 1120px;\n  }\n\n  .iron_product * { box-sizing: border-box; }\n\n  .iron_product h2,\n  .iron_product h3,\n  .iron_product h4 {\n    color: var(--iron_ink);\n    line-height: 1.2;\n    margin-top: 0;\n  }\n\n  .iron_product h2 {\n    font-family: Georgia, \"Times New Roman\", serif;\n    font-size: clamp(32px, 5vw, 54px);\n    font-weight: 500;\n    margin-bottom: 18px;\n  }\n\n  .iron_product h3 {\n    font-family: Georgia, \"Times New Roman\", serif;\n    font-size: clamp(25px, 3vw, 34px);\n    font-weight: 500;\n    margin-bottom: 16px;\n  }\n\n  .iron_product h4 { font-size: 18px; margin-bottom: 10px; }\n  .iron_product p { margin: 0 0 16px; }\n\n  .iron_product ul {\n    margin: 8px 0 18px;\n    padding-left: 22px;\n  }\n\n  .iron_product li { margin-bottom: 7px; }\n\n  .iron_hero {\n    background: linear-gradient(135deg, var(--iron_cream), #fbf8f3);\n    border: 1px solid var(--iron_line);\n    border-radius: 22px;\n    margin-bottom: 28px;\n    padding: clamp(24px, 5vw, 52px);\n  }\n\n  .iron_eyebrow {\n    color: var(--iron_taupe_dark);\n    font-size: 13px;\n    font-weight: 700;\n    letter-spacing: 0.12em;\n    margin-bottom: 12px;\n    text-transform: uppercase;\n  }\n\n  .iron_lead {\n    font-size: 19px;\n    max-width: 900px;\n  }\n\n  .iron_notice,\n  .iron_warning {\n    background: var(--iron_white);\n    border-left: 5px solid var(--iron_taupe);\n    border-radius: 10px;\n    margin-top: 22px;\n    padding: 17px 19px;\n  }\n\n  .iron_warning {\n    background: var(--iron_red_bg);\n    border-color: var(--iron_red_text);\n    color: #672b2b;\n  }\n\n  .iron_grid,\n  .iron_steps,\n  .iron_method_grid,\n  .iron_trust_grid {\n    display: grid;\n    gap: 14px;\n    grid-template-columns: repeat(4, minmax(0, 1fr));\n    margin-top: 22px;\n  }\n\n  .iron_steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }\n\n  .iron_stat,\n  .iron_method_item,\n  .iron_trust_item,\n  .iron_step {\n    background: rgba(255, 255, 255, 0.84);\n    border: 1px solid var(--iron_line);\n    border-radius: 14px;\n    min-height: 112px;\n    padding: 17px;\n  }\n\n  .iron_method_item,\n  .iron_trust_item { background: #fbf8f3; }\n\n  .iron_stat strong,\n  .iron_method_item strong,\n  .iron_trust_item strong {\n    display: block;\n    font-size: 15px;\n    margin-bottom: 6px;\n  }\n\n  .iron_stat strong { font-size: 18px; }\n\n  .iron_stat span,\n  .iron_method_item span,\n  .iron_trust_item span {\n    color: var(--iron_muted);\n    font-size: 14px;\n    line-height: 1.55;\n  }\n\n  .iron_section {\n    background: var(--iron_white);\n    border: 1px solid var(--iron_line);\n    border-radius: 18px;\n    margin-bottom: 24px;\n    padding: clamp(22px, 4vw, 38px);\n  }\n\n  .iron_table_wrap {\n    overflow-x: auto;\n    width: 100%;\n  }\n\n  .iron_table {\n    border-collapse: collapse;\n    margin: 18px 0 4px;\n    min-width: 720px;\n    width: 100%;\n  }\n\n  .iron_table th,\n  .iron_table td {\n    border-bottom: 1px solid var(--iron_line);\n    padding: 15px 14px;\n    text-align: left;\n    vertical-align: top;\n  }\n\n  .iron_table th {\n    background: var(--iron_cream);\n    color: var(--iron_taupe_dark);\n    font-size: 13px;\n    letter-spacing: 0.04em;\n    text-transform: uppercase;\n  }\n\n  .iron_table tr:last-child td { border-bottom: 0; }\n  .iron_table td:first-child { width: 190px; }\n\n  .iron_status {\n    border: 1px solid currentColor;\n    border-radius: 999px;\n    display: inline-block;\n    font-size: 12px;\n    font-weight: 700;\n    line-height: 1.2;\n    padding: 6px 10px;\n    white-space: nowrap;\n  }\n\n  .iron_critical { background: var(--iron_red_bg); color: var(--iron_red_text); }\n  .iron_low { background: var(--iron_amber_bg); color: var(--iron_amber_text); }\n  .iron_normal { background: var(--iron_green_bg); color: var(--iron_green_text); }\n  .iron_high { background: var(--iron_orange_bg); color: var(--iron_orange_text); }\n  .iron_info { background: var(--iron_blue_bg); color: var(--iron_blue_text); }\n\n  .iron_step { background: var(--iron_cream); }\n\n  .iron_step_number {\n    align-items: center;\n    background: var(--iron_taupe_dark);\n    border-radius: 50%;\n    color: #ffffff;\n    display: inline-flex;\n    font-weight: 700;\n    height: 32px;\n    justify-content: center;\n    margin-bottom: 10px;\n    width: 32px;\n  }\n\n  .iron_biomarker {\n    border: 1px solid var(--iron_line);\n    border-radius: 14px;\n    margin-bottom: 14px;\n    overflow: hidden;\n  }\n\n  .iron_biomarker summary {\n    align-items: center;\n    background: var(--iron_cream);\n    color: var(--iron_ink);\n    cursor: pointer;\n    display: flex;\n    font-size: 18px;\n    font-weight: 700;\n    justify-content: space-between;\n    list-style: none;\n    padding: 18px 20px;\n  }\n\n  .iron_biomarker summary::-webkit-details-marker,\n  .iron_sources summary::-webkit-details-marker { display: none; }\n\n  .iron_biomarker summary::after,\n  .iron_sources summary::after {\n    color: var(--iron_taupe_dark);\n    content: \"+\";\n    font-size: 25px;\n    font-weight: 400;\n    line-height: 1;\n  }\n\n  .iron_biomarker[open] summary::after,\n  .iron_sources details[open] summary::after { content: \"−\"; }\n\n  .iron_biomarker_body { padding: 22px 20px 25px; }\n\n  .iron_subnote {\n    background: #fbf8f3;\n    border: 1px solid var(--iron_line);\n    border-radius: 11px;\n    margin: 18px 0;\n    padding: 15px 17px;\n  }\n\n  .iron_review_grid {\n    display: grid;\n    gap: 14px;\n    grid-template-columns: repeat(3, minmax(0, 1fr));\n    margin-top: 22px;\n  }\n\n  .iron_review_card {\n    background: #fbf8f3;\n    border: 1px solid var(--iron_line);\n    border-radius: 14px;\n    display: flex;\n    flex-direction: column;\n    min-height: 100%;\n    padding: 18px;\n  }\n\n  .iron_review_card_top {\n    align-items: center;\n    display: flex;\n    gap: 14px;\n    margin-bottom: 15px;\n  }\n\n  .iron_review_avatar {\n    aspect-ratio: 1 \/ 1 !important;\n    background-color: var(--iron_cream) !important;\n    background-repeat: no-repeat !important;\n    border: 1px solid var(--iron_line) !important;\n    border-radius: 999px !important;\n    box-shadow: 0 2px 8px rgba(47, 42, 40, 0.08) !important;\n    display: block !important;\n    flex: 0 0 92px !important;\n    height: 92px !important;\n    max-height: 92px !important;\n    max-width: 92px !important;\n    min-height: 92px !important;\n    min-width: 92px !important;\n    overflow: hidden !important;\n    width: 92px !important;\n  }\n\n  .iron_review_avatar_rimas {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/rimas_geiga.png?v=1785071125\") !important;\n    background-position: 50% 18% !important;\n    background-size: 118% auto !important;\n  }\n\n  .iron_review_avatar_snieguole {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Snieguole_Geige.jpg?v=1785070794\") !important;\n    background-position: 50% 15% !important;\n    background-size: 118% auto !important;\n  }\n\n  .iron_review_avatar_veronika {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Veronika_Matutyte_Doctor.jpg?v=1785075107\") !important;\n    background-position: 50% 18% !important;\n    background-size: 128% auto !important;\n  }\n\n  .iron_review_label {\n    color: var(--iron_taupe_dark);\n    display: block;\n    font-size: 11px;\n    font-weight: 700;\n    letter-spacing: 0.08em;\n    margin-bottom: 5px;\n    text-transform: uppercase;\n  }\n\n  .iron_review_name {\n    color: var(--iron_ink);\n    font-family: Georgia, \"Times New Roman\", serif;\n    font-size: 20px;\n    font-weight: 500;\n    line-height: 1.15;\n    margin: 0 0 5px;\n  }\n\n  .iron_review_title {\n    color: var(--iron_muted);\n    font-size: 13px;\n    line-height: 1.45;\n    margin: 0;\n  }\n\n  .iron_review_scope {\n    font-size: 14px;\n    line-height: 1.6;\n    margin-bottom: 16px;\n  }\n\n  .iron_review_link,\n  .iron_board_link a,\n  .iron_sources a {\n    color: var(--iron_taupe_dark);\n    font-weight: 700;\n    text-decoration: underline;\n    text-decoration-thickness: 1px;\n    text-underline-offset: 4px;\n  }\n\n  .iron_review_link {\n    font-size: 13px;\n    margin-top: auto;\n  }\n\n  .iron_review_meta {\n    background: var(--iron_cream);\n    border-radius: 12px;\n    display: grid;\n    gap: 12px;\n    grid-template-columns: repeat(3, minmax(0, 1fr));\n    margin-top: 20px;\n    padding: 17px 18px;\n  }\n\n  .iron_review_meta strong {\n    display: block;\n    font-size: 13px;\n    margin-bottom: 3px;\n  }\n\n  .iron_review_meta span {\n    color: var(--iron_muted);\n    font-size: 13px;\n  }\n\n  .iron_board_link {\n    border-top: 1px solid var(--iron_line);\n    margin-top: 18px;\n    padding-top: 16px;\n  }\n\n  .iron_sources details {\n    border: 1px solid var(--iron_line);\n    border-radius: 12px;\n    overflow: hidden;\n  }\n\n  .iron_sources summary {\n    align-items: center;\n    background: var(--iron_cream);\n    cursor: pointer;\n    display: flex;\n    font-weight: 700;\n    justify-content: space-between;\n    list-style: none;\n    padding: 16px 18px;\n  }\n\n  .iron_sources_body { padding: 18px; }\n\n  .iron_faq details {\n    border-bottom: 1px solid var(--iron_line);\n    padding: 14px 0;\n  }\n\n  .iron_faq details:last-child { border-bottom: 0; }\n\n  .iron_faq summary {\n    cursor: pointer;\n    font-weight: 700;\n  }\n\n  .iron_faq details p { margin-top: 12px; }\n\n  .iron_footer_note {\n    background: var(--iron_taupe_dark);\n    border-radius: 16px;\n    color: #ffffff;\n    padding: 24px;\n  }\n\n  .iron_footer_note h3,\n  .iron_footer_note strong { color: #ffffff; }\n\n  @media (max-width: 900px) {\n    .iron_grid,\n    .iron_method_grid,\n    .iron_trust_grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }\n\n    .iron_steps,\n    .iron_review_grid { grid-template-columns: 1fr; }\n\n    .iron_review_meta { grid-template-columns: 1fr; }\n  }\n\n  @media (max-width: 540px) {\n    .iron_grid,\n    .iron_method_grid,\n    .iron_trust_grid { grid-template-columns: 1fr; }\n\n    .iron_product { font-size: 15px; }\n\n    .iron_biomarker summary {\n      font-size: 16px;\n      padding: 16px;\n    }\n\n    .iron_biomarker_body { padding: 18px 15px 21px; }\n\n    .iron_review_avatar {\n      flex-basis: 78px !important;\n      height: 78px !important;\n      max-height: 78px !important;\n      max-width: 78px !important;\n      min-height: 78px !important;\n      min-width: 78px !important;\n      width: 78px !important;\n    }\n  }\n\n  .iron_review_avatar_laura {\n    background-image: url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/5W4A9892.jpg?v=1785070092\") !important;\n    background-position: 50% 15% !important;\n    background-size: 132% auto !important;\n  }\n\u003c\/style\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003carticle class=\"iron_product\"\u003e\n\u003csection class=\"iron_hero\"\u003e\n\u003cp class=\"iron_eyebrow\"\u003eAt home ferritin and iron profile blood test\u003c\/p\u003e\n\u003ch2\u003eHome Iron Blood Test UK | Ferritin \u0026amp; Iron Profile\u003c\/h2\u003e\n\u003cp class=\"iron_lead\"\u003e\u003cstrong\u003eA five marker home blood test assessing iron stores, circulating iron and iron transport.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe panel measures ferritin, serum iron, transferrin, TIBC and transferrin saturation. It can provide useful context where low iron stores or iron overload is suspected, but it cannot diagnose anaemia or establish the underlying cause by itself.\u003c\/p\u003e\n\u003cdiv class=\"iron_grid\"\u003e\n\u003cdiv class=\"iron_stat\"\u003e\n\u003cstrong\u003e5 biomarkers\u003c\/strong\u003e\u003cspan\u003eFerritin, iron, transferrin, TIBC and transferrin saturation\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_stat\"\u003e\n\u003cstrong\u003eHome collection\u003c\/strong\u003e\u003cspan\u003eCapillary blood collected into the supplied microtainer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_stat\"\u003e\n\u003cstrong\u003eUK laboratory pathway\u003c\/strong\u003e\u003cspan\u003eUKAS accredited and CQC registered laboratory processing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_stat\"\u003e\n\u003cstrong\u003eProduct code\u003c\/strong\u003e\u003cspan\u003eC1BLP06400\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_notice\"\u003e\n\u003cstrong\u003eThis is an iron profile, not an anaemia diagnosis\u003c\/strong\u003e\n\u003cp\u003eThe panel does not include haemoglobin, red blood cell indices or a full blood count. These are required to determine whether anaemia is present and how severe it may be.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_warning\"\u003e\n\u003cstrong\u003eDo not start high dose iron from one result\u003c\/strong\u003e\n\u003cp\u003eIron treatment should follow appropriate assessment because both iron deficiency and iron overload can be harmful. Do not stop prescribed iron or begin high dose supplementation without clinical advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"iron_section\"\u003e\n\u003cp class=\"iron_eyebrow\"\u003eQuality and compliance\u003c\/p\u003e\n\u003ch3\u003eHome testing supported by UK clinical standards\u003c\/h3\u003e\n\u003cdiv class=\"iron_trust_grid\"\u003e\n\u003cdiv class=\"iron_trust_item\"\u003e\n\u003cstrong\u003eUKAS accredited laboratories\u003c\/strong\u003e \u003cspan\u003eMedical laboratory accreditation assesses quality, competence and analytical performance.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_trust_item\"\u003e\n\u003cstrong\u003eCQC registered services\u003c\/strong\u003e \u003cspan\u003eThe diagnostic pathway uses organisations registered with the Care Quality Commission.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_trust_item\"\u003e\n\u003cstrong\u003eCompliant collection equipment\u003c\/strong\u003e \u003cspan\u003eUKCA and CE marked equipment supported by an ISO 13485 quality management framework.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_trust_item\"\u003e\n\u003cstrong\u003eClinical follow up guidance\u003c\/strong\u003e \u003cspan\u003ePreparation, interpretation, limitations and GP escalation information are included.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"iron_section\"\u003e\n\u003ch3\u003eWhat this iron profile measures\u003c\/h3\u003e\n\u003cdiv class=\"iron_table_wrap\"\u003e\n\u003ctable class=\"iron_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eHealth area\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eBiomarkers\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat they may help show\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStored iron\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFerritin\u003c\/td\u003e\n\u003ctd\u003eThe principal marker used to estimate iron stores, with important inflammation limitations.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCirculating iron\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSerum iron\u003c\/td\u003e\n\u003ctd\u003eThe amount of iron circulating at the time of collection.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIron transport\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTransferrin and TIBC\u003c\/td\u003e\n\u003ctd\u003eThe protein carrying iron and the blood's estimated total binding capacity.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIron availability\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTransferrin saturation\u003c\/td\u003e\n\u003ctd\u003eThe percentage of available transferrin binding sites occupied by iron.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"iron_section\"\u003e\n\u003ch3\u003eWho may consider this test?\u003c\/h3\u003e\n\u003cp\u003eThis panel may be considered by adults who want to review selected iron markers in the context of:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePersistent tiredness, weakness or reduced exercise tolerance\u003c\/li\u003e\n\u003cli\u003eBreathlessness, palpitations, headaches or restless legs\u003c\/li\u003e\n\u003cli\u003eHeavy menstrual bleeding or another source of blood loss\u003c\/li\u003e\n\u003cli\u003ePregnancy planning or previous low iron stores\u003c\/li\u003e\n\u003cli\u003eFrequent blood donation\u003c\/li\u003e\n\u003cli\u003eA vegan, vegetarian or otherwise restrictive diet\u003c\/li\u003e\n\u003cli\u003eGastrointestinal disease, bariatric surgery or possible malabsorption\u003c\/li\u003e\n\u003cli\u003eA family history of hereditary haemochromatosis\u003c\/li\u003e\n\u003cli\u003eMonitoring requested by a GP or another qualified clinician\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSymptoms associated with iron imbalance are non specific. A normal profile does not exclude every medical cause of tiredness or breathlessness.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"iron_section\"\u003e\n\u003ch3\u003eHow the home iron blood test works\u003c\/h3\u003e\n\u003cdiv class=\"iron_steps\"\u003e\n\u003cdiv class=\"iron_step\"\u003e\n\u003cspan class=\"iron_step_number\"\u003e1\u003c\/span\u003e\n\u003ch4\u003ePrepare consistently\u003c\/h4\u003e\n\u003cp\u003eFollow the 12 hour fasting instruction and record supplements, medicines and recent treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_step\"\u003e\n\u003cspan class=\"iron_step_number\"\u003e2\u003c\/span\u003e\n\u003ch4\u003eCollect and return\u003c\/h4\u003e\n\u003cp\u003eCollect capillary blood into the supplied microtainer and return it using the provided packaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_step\"\u003e\n\u003cspan class=\"iron_step_number\"\u003e3\u003c\/span\u003e\n\u003ch4\u003eReview the complete pattern\u003c\/h4\u003e\n\u003cp\u003eInterpret ferritin, serum iron, transferrin, TIBC and TSAT together rather than relying on one value.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"iron_section\"\u003e\n\u003ch3\u003ePreparing for the test\u003c\/h3\u003e\n\u003cdiv class=\"iron_table_wrap\"\u003e\n\u003ctable class=\"iron_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePreparation\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFasting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFollow the kit instruction to fast for 12 hours. Have plain water only and collect in the morning where possible.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIron products\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFollow the product instruction about non prescribed iron. Do not stop prescribed tablets, infusions or injections without medical advice.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBiotin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord high dose biotin and follow the laboratory instruction about whether it should be paused.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMedicines\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord chloramphenicol, chemotherapy, monoclonal antibodies and other prescribed medicines.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHormone treatment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord the contraceptive pill, oestrogen treatment and pregnancy because they can affect transferrin and TIBC.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecent treatment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord blood transfusion, iron infusion, iron injection or recent oral iron treatment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInflammation or infection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFerritin can rise during inflammation. A clinician may request CRP, liver tests or repeat testing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"iron_section\"\u003e\n\u003ch3\u003eCommon iron profile patterns\u003c\/h3\u003e\n\u003cp\u003eThese simplified examples support interpretation and are not diagnoses.\u003c\/p\u003e\n\u003cdiv class=\"iron_table_wrap\"\u003e\n\u003ctable class=\"iron_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePossible pattern\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMarkers that may be seen\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eImportant qualification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDepleted iron stores\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLow ferritin, low TSAT, lower serum iron and higher transferrin or TIBC.\u003c\/td\u003e\n\u003ctd\u003eA full blood count is required to determine whether anaemia is present.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInflammation related pattern\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNormal or high ferritin with low serum iron and low TSAT, often with low or normal transferrin.\u003c\/td\u003e\n\u003ctd\u003eFerritin may be raised by inflammation and can mask iron deficiency.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePossible iron overload\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRaised TSAT and serum iron with low or normal TIBC, sometimes with raised ferritin.\u003c\/td\u003e\n\u003ctd\u003eRepeat fasting studies, liver tests and HFE genetic assessment may be required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecent supplementation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTemporarily raised serum iron or TSAT, with ferritin depending on longer term stores.\u003c\/td\u003e\n\u003ctd\u003eRecord the dose and timing before collection.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOestrogen or pregnancy effect\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigher transferrin or TIBC, with interpretation depending on ferritin and TSAT.\u003c\/td\u003e\n\u003ctd\u003ePregnancy requires dedicated reference intervals and clinical oversight.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"iron_section\"\u003e\n\u003ch3\u003eBiomarkers and result interpretation\u003c\/h3\u003e\n\u003cp\u003eSelect each marker to read what it measures, preparation guidance and how low, normal, high or critical results may be considered.\u003c\/p\u003e\n\u003cdetails class=\"iron_biomarker\"\u003e\n\u003csummary\u003eTransferrin saturation\u003c\/summary\u003e\n\u003cdiv class=\"iron_biomarker_body\"\u003e\n\u003cp\u003eTransferrin saturation, often shortened to TSAT, estimates the percentage of iron binding sites on transferrin that are occupied. It is calculated from serum iron and TIBC.\u003c\/p\u003e\n\u003cp\u003eLow TSAT may support iron deficiency, while a persistently raised result may require assessment for iron overload. It should be interpreted with ferritin, serum iron, transferrin, inflammation, liver health and supplement use.\u003c\/p\u003e\n\u003cdiv class=\"iron_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFollow the supplied 12 hour fasting instruction and collect in the morning where possible. Plain water is normally allowed. Record iron tablets, multivitamins, injections, infusions, recent transfusions, biotin and hormone treatment. Do not stop prescribed treatment without advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"iron_table_wrap\"\u003e\n\u003ctable class=\"iron_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur with iron deficiency, chronic blood loss, poor absorption, inflammation or increased iron requirements.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the complete pattern with a GP. A full blood count may also be required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFalls within the laboratory interval.\u003c\/td\u003e\n\u003ctd\u003eInterpret with ferritin and the other iron studies.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur after supplementation, iron treatment, transfusion, hereditary haemochromatosis, liver disease or other causes.\u003c\/td\u003e\n\u003ctd\u003eDiscuss a persistent or unexplained result with a clinician.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very high or rapidly rising result may require prompt assessment, especially with a raised ferritin or liver abnormalities.\u003c\/td\u003e\n\u003ctd\u003eFollow the laboratory's urgent advice.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"iron_biomarker\"\u003e\n\u003csummary\u003eFerritin\u003c\/summary\u003e\n\u003cdiv class=\"iron_biomarker_body\"\u003e\n\u003cp\u003eFerritin is the principal laboratory marker used to estimate stored iron. A low result strongly supports depleted iron stores.\u003c\/p\u003e\n\u003cp\u003eFerritin is also an acute phase protein and may rise during inflammation, infection, liver disease, obesity and other conditions. A normal or high result can therefore sometimes mask iron deficiency.\u003c\/p\u003e\n\u003cdiv class=\"iron_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFollow the supplied 12 hour fasting instruction and collect in the morning where possible. Plain water is normally allowed. Record iron tablets, multivitamins, injections, infusions, recent transfusions, biotin and hormone treatment. Do not stop prescribed treatment without advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"iron_table_wrap\"\u003e\n\u003ctable class=\"iron_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very low result indicates markedly depleted iron stores and may coexist with significant anaemia or ongoing blood loss.\u003c\/td\u003e\n\u003ctd\u003eArrange prompt GP assessment and a full blood count.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eNICE guidance states that ferritin below 30 micrograms per litre confirms iron deficiency in adults.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the cause, including bleeding, diet, donation and malabsorption, with a clinician.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFalls within the reference interval.\u003c\/td\u003e\n\u003ctd\u003eConsider symptoms, inflammation, TSAT and a full blood count where available.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur with inflammation, infection, liver disease, alcohol use, metabolic conditions, iron overload, malignancy or supplementation.\u003c\/td\u003e\n\u003ctd\u003eDo not assume haemochromatosis from ferritin alone. Discuss the complete pattern.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA markedly raised result may require urgent assessment depending on symptoms, liver tests and the laboratory threshold.\u003c\/td\u003e\n\u003ctd\u003eFollow the report's escalation advice.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"iron_biomarker\"\u003e\n\u003csummary\u003eSerum iron\u003c\/summary\u003e\n\u003cdiv class=\"iron_biomarker_body\"\u003e\n\u003cp\u003eSerum iron measures iron circulating in the blood at the time of collection. Iron is needed to produce haemoglobin, but the serum result changes with meals, time of day, supplements and illness.\u003c\/p\u003e\n\u003cp\u003eIt should not be used alone to diagnose iron deficiency, iron deficiency anaemia or haemochromatosis.\u003c\/p\u003e\n\u003cdiv class=\"iron_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFollow the supplied 12 hour fasting instruction and collect in the morning where possible. Plain water is normally allowed. Record iron tablets, multivitamins, injections, infusions, recent transfusions, biotin and hormone treatment. Do not stop prescribed treatment without advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"iron_table_wrap\"\u003e\n\u003ctable class=\"iron_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur with iron deficiency, inflammation, chronic illness, blood loss or poor absorption.\u003c\/td\u003e\n\u003ctd\u003eInterpret with ferritin, transferrin, TIBC, TSAT and a full blood count.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFalls within the laboratory interval.\u003c\/td\u003e\n\u003ctd\u003eA normal serum iron result does not exclude depleted iron stores.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay reflect recent supplements, iron treatment, transfusion, haemolysis, liver disease or iron overload.\u003c\/td\u003e\n\u003ctd\u003eDiscuss an unexpected result with a clinician.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eVery high circulating iron may occur with overdose or acute iron toxicity.\u003c\/td\u003e\n\u003ctd\u003eSeek immediate medical advice where overdose is possible.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"iron_biomarker\"\u003e\n\u003csummary\u003eTransferrin\u003c\/summary\u003e\n\u003cdiv class=\"iron_biomarker_body\"\u003e\n\u003cp\u003eTransferrin is produced mainly by the liver and transports iron through the blood. The concentration often increases when the body is trying to capture more iron.\u003c\/p\u003e\n\u003cp\u003eTransferrin is affected by pregnancy, oestrogen treatment, inflammation, liver disease, kidney protein loss and nutritional status.\u003c\/p\u003e\n\u003cdiv class=\"iron_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFollow the supplied 12 hour fasting instruction and collect in the morning where possible. Plain water is normally allowed. Record iron tablets, multivitamins, injections, infusions, recent transfusions, biotin and hormone treatment. Do not stop prescribed treatment without advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"iron_table_wrap\"\u003e\n\u003ctable class=\"iron_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur with inflammation, liver disease, poor nutrition, kidney protein loss or iron overload.\u003c\/td\u003e\n\u003ctd\u003eInterpret with ferritin, serum iron and TSAT.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFalls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eReview it as part of the full iron profile.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eOften occurs when iron stores are depleted and may also be influenced by pregnancy or oestrogen containing treatment.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result if ferritin or TSAT is also low.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"iron_biomarker\"\u003e\n\u003csummary\u003eTotal iron binding capacity\u003c\/summary\u003e\n\u003cdiv class=\"iron_biomarker_body\"\u003e\n\u003cp\u003eTotal iron binding capacity, known as TIBC, estimates the total amount of iron that blood proteins could bind. It mainly reflects transferrin.\u003c\/p\u003e\n\u003cp\u003eTIBC may be measured directly or calculated using serum iron and UIBC. UIBC represents the unused iron binding capacity and may not appear as a separate reported biomarker.\u003c\/p\u003e\n\u003cdiv class=\"iron_subnote\"\u003e\n\u003cstrong\u003eAbout UIBC\u003c\/strong\u003e\n\u003cp\u003eThe supplier description refers to UIBC, while the reported biomarker list shows TIBC. UIBC may be used within the TIBC calculation but is not necessarily displayed as a separate result.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFollow the supplied 12 hour fasting instruction and collect in the morning where possible. Plain water is normally allowed. Record iron tablets, multivitamins, injections, infusions, recent transfusions, biotin and hormone treatment. Do not stop prescribed treatment without advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"iron_table_wrap\"\u003e\n\u003ctable class=\"iron_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMay occur with inflammation, liver disease, poor nutrition, kidney disease or iron overload.\u003c\/td\u003e\n\u003ctd\u003eInterpret with ferritin, serum iron, transferrin and TSAT.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFalls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eA normal TIBC does not by itself establish that iron status is normal.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"iron_status iron_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eCommonly occurs when iron stores are depleted and may also be influenced by pregnancy or oestrogen treatment.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the complete profile with a GP if ferritin or TSAT is low.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection id=\"content-standards\" class=\"iron_section\"\u003e\n\u003cp class=\"iron_eyebrow\"\u003eEvidence and content standards\u003c\/p\u003e\n\u003ch3\u003eHow this product information was fact checked\u003c\/h3\u003e\n\u003cp\u003eThis page was prepared from the supplied five marker iron profile specification and checked against current NICE, NHS and UK laboratory guidance on ferritin, serum iron, transferrin, TIBC, transferrin saturation, iron deficiency and haemochromatosis.\u003c\/p\u003e\n\u003cdiv class=\"iron_method_grid\"\u003e\n\u003cdiv class=\"iron_method_item\"\u003e\n\u003cstrong\u003eProduct specification checked\u003c\/strong\u003e \u003cspan\u003eProduct type, specimen, fasting instruction, five reported markers and product code.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_method_item\"\u003e\n\u003cstrong\u003eUK clinical guidance checked\u003c\/strong\u003e \u003cspan\u003eNICE and NHS information used for ferritin thresholds, iron study patterns and haemochromatosis context.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_method_item\"\u003e\n\u003cstrong\u003eClinical boundaries\u003c\/strong\u003e \u003cspan\u003eThe page distinguishes iron status from a diagnosis of anaemia, blood loss, malabsorption or iron overload.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_method_item\"\u003e\n\u003cstrong\u003eReview cycle\u003c\/strong\u003e \u003cspan\u003eReview at least annually and earlier when laboratory methods or UK guidance changes.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection id=\"medical-review\" class=\"iron_section\"\u003e\n\u003cp class=\"iron_eyebrow\"\u003eClinical accountability\u003c\/p\u003e\n\u003ch3\u003eFact checked, medically reviewed and editorially overseen\u003c\/h3\u003e\n\u003cp\u003eThe review structure separates nutritional and evidence verification, medical safety review and patient facing editorial oversight. The page does not replace an individual assessment by a GP, haematology professional or gastroenterology service.\u003c\/p\u003e\n\u003cdiv class=\"iron_review_grid\"\u003e\n\u003carticle class=\"iron_review_card\"\u003e\n\u003cdiv class=\"iron_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"iron_review_avatar iron_review_avatar_rimas\" aria-label=\"Portrait of Dr Rimas Geiga\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"iron_review_label\"\u003eFact checked by\u003c\/span\u003e\n\u003ch4 class=\"iron_review_name\"\u003eDr Rimas Geiga\u003c\/h4\u003e\n\u003cp class=\"iron_review_title\"\u003eMedical Doctor, Nutritional Sciences Adviser and Healthy Ageing Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"iron_review_scope\"\u003eChecked iron nutrition, ferritin, supplementation, dietary context and the evidence based limitations of individual iron markers.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/dr-rimas-geiga-medical-doctor-nutritional-sciences-adviser-and-healthy-ageing-expert\" class=\"iron_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003carticle class=\"iron_review_card\"\u003e\n\u003cdiv class=\"iron_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"iron_review_avatar iron_review_avatar_veronika\" aria-label=\"Portrait of Veronika Matutyte\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"iron_review_label\"\u003eMedically reviewed by\u003c\/span\u003e\n\u003ch4 class=\"iron_review_name\"\u003eVeronika Matutyte\u003c\/h4\u003e\n\u003cp class=\"iron_review_title\"\u003eMedical Doctor and Healthcare Management Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"iron_review_scope\"\u003eReviewed anaemia limitations, blood loss and urgent symptom guidance, medicine considerations and the safety of the home testing pathway.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/veronika-matutyte-medical-doctor-and-healthcare-management-expert\" class=\"iron_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003carticle class=\"iron_review_card\"\u003e\n\u003cdiv class=\"iron_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"iron_review_avatar iron_review_avatar_laura\" aria-label=\"Portrait of Dr Laura Geige\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"iron_review_label\"\u003eClinical and editorial oversight\u003c\/span\u003e\n\u003ch4 class=\"iron_review_name\"\u003eDr Laura Geige\u003c\/h4\u003e\n\u003cp class=\"iron_review_title\"\u003eMedical Director, Senior Practitioner and Skin Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"iron_review_scope\"\u003eReviewed patient facing clarity, responsible medical claims, escalation language and the separation of test information from personalised diagnosis.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/dr-laura-geige-medical-director-senior-practitioner-and-skin-expert\" class=\"iron_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"iron_review_meta\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEvidence checked\u003c\/strong\u003e \u003cspan\u003e26 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMedical review date\u003c\/strong\u003e \u003cspan\u003e26 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eNext scheduled review\u003c\/strong\u003e \u003cspan\u003eBy 26 July 2027 or earlier when UK guidance changes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"iron_board_link\"\u003e\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/medical-advisory-board\"\u003eMeet the Grace Belgravia Medical Advisory Board\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"iron_section iron_sources\"\u003e\n\u003cp class=\"iron_eyebrow\"\u003eAuthoritative references\u003c\/p\u003e\n\u003ch3\u003eUK iron studies and anaemia information\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003eView NICE, NHS and UK laboratory sources\u003c\/summary\u003e\n\u003cdiv class=\"iron_sources_body\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cks.nice.org.uk\/topics\/anaemia-iron-deficiency\/diagnosis\/investigations\/\"\u003eNICE iron deficiency investigations\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nhs.uk\/tests-and-treatments\/tibc-test\/\"\u003eNHS TIBC and transferrin test information\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nhs.uk\/conditions\/iron-deficiency-anaemia\/\"\u003eNHS iron deficiency anaemia information\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nhs.uk\/conditions\/haemochromatosis\/diagnosis\/\"\u003eNHS haemochromatosis diagnosis\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sheffieldlaboratorymedicine.nhs.uk\/search-test.php?search=3268\"\u003eSheffield Laboratory Medicine iron profile information\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.gloshospitals.nhs.uk\/our-services\/services-we-offer\/pathology\/tests-and-investigations\/ion-transferrin-and-transferrin-saturation\/\"\u003eNHS iron, transferrin and transferrin saturation information\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.ukas.com\/accreditation\/standards\/medical-laboratory-accreditation\/\"\u003eUKAS medical laboratory accreditation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.cqc.org.uk\/guidance-regulation\/providers\/registration\/scope-registration\/regulated-activities\/diagnostic-and-screening-procedures\"\u003eCQC diagnostic and screening services guidance\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"iron_section iron_faq\"\u003e\n\u003cp class=\"iron_eyebrow\"\u003eSearch led questions\u003c\/p\u003e\n\u003ch3\u003eHome iron blood test FAQs\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I test my iron levels at home?\u003c\/summary\u003e\n\u003cp\u003eYes. This kit uses a capillary blood sample collected at home and returned for laboratory analysis. It measures five iron related markers rather than providing an instant home reading.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does a full iron profile blood test check?\u003c\/summary\u003e\n\u003cp\u003eThis panel checks ferritin, serum iron, transferrin, total iron binding capacity and transferrin saturation. Together they provide information about iron stores, circulating iron and iron transport.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this test diagnose iron deficiency anaemia?\u003c\/summary\u003e\n\u003cp\u003eNo. Anaemia is diagnosed using haemoglobin and red blood cell measurements from a full blood count, which are not included. The profile can support assessment of iron status but cannot diagnose anaemia by itself.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between iron and ferritin?\u003c\/summary\u003e\n\u003cp\u003eSerum iron measures iron circulating at the time of collection and can vary with meals and time of day. Ferritin is the main marker used to estimate stored iron, although inflammation and liver conditions can raise it.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat ferritin level suggests iron deficiency in the UK?\u003c\/summary\u003e\n\u003cp\u003eNICE guidance states that ferritin below 30 micrograms per litre confirms iron deficiency in adults. A higher ferritin does not always exclude deficiency where inflammation or chronic illness is present.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is transferrin saturation?\u003c\/summary\u003e\n\u003cp\u003eTransferrin saturation estimates the percentage of transferrin iron binding sites that are occupied. It is calculated from serum iron and TIBC and can help assess possible deficiency or iron overload.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is transferrin?\u003c\/summary\u003e\n\u003cp\u003eTransferrin is the main protein that transports iron through the blood. It may rise when iron stores are low and may fall with inflammation, liver disease, poor nutrition or iron overload.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is TIBC?\u003c\/summary\u003e\n\u003cp\u003eTotal iron binding capacity estimates the total amount of iron that blood proteins could bind and transport. TIBC is often higher in iron deficiency and lower or normal in inflammation or iron overload.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is UIBC?\u003c\/summary\u003e\n\u003cp\u003eUnsaturated iron binding capacity estimates the unused iron binding capacity. Some laboratories calculate TIBC from serum iron plus UIBC, but UIBC may not be reported separately on every result.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to fast for an iron blood test?\u003c\/summary\u003e\n\u003cp\u003eFollow the kit instruction to fast for 12 hours with plain water only. Serum iron and transferrin saturation can vary with meals and time of day, so a morning fasting sample improves consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I stop iron supplements before testing?\u003c\/summary\u003e\n\u003cp\u003eFollow the kit instruction for non prescribed iron products. Do not stop prescribed iron, injections or infusions without medical advice. Record the dose and timing because supplementation can affect the result.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan biotin affect an iron test?\u003c\/summary\u003e\n\u003cp\u003eHigh dose biotin, which is vitamin B7, can interfere with some laboratory immunoassays. Follow the kit guidance and ask a clinician before stopping prescribed biotin.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan the contraceptive pill affect iron results?\u003c\/summary\u003e\n\u003cp\u003eOestrogen containing contraception can alter transferrin and iron binding capacity. Record the exact contraceptive or hormone treatment so the result can be interpreted in context.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan inflammation affect ferritin?\u003c\/summary\u003e\n\u003cp\u003eYes. Ferritin is an acute phase protein and may rise with infection, inflammation, liver disease, obesity or other conditions. A normal or high ferritin can therefore sometimes mask iron deficiency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan a high ferritin result mean haemochromatosis?\u003c\/summary\u003e\n\u003cp\u003ePossibly, but high ferritin alone does not diagnose iron overload. Persistent raised transferrin saturation together with raised ferritin may prompt liver tests, repeat fasting iron studies and HFE genetic testing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan a normal serum iron result rule out iron deficiency?\u003c\/summary\u003e\n\u003cp\u003eNo. Serum iron changes during the day and after meals and does not reflect stored iron reliably. Ferritin and the complete pattern are more informative.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWho may be at risk of low iron stores?\u003c\/summary\u003e\n\u003cp\u003eRisk can be higher with heavy menstrual bleeding, pregnancy, blood donation, gastrointestinal blood loss, restrictive diets, malabsorption, bariatric surgery, inflammatory disease and increased physiological requirements.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat symptoms can occur with low iron or anaemia?\u003c\/summary\u003e\n\u003cp\u003ePossible symptoms include tiredness, weakness, breathlessness, palpitations, headaches, pale skin, reduced exercise tolerance and restless legs. These symptoms are not specific and need wider assessment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen should low iron symptoms be treated as urgent?\u003c\/summary\u003e\n\u003cp\u003eSeek urgent help for chest pain, severe breathlessness, collapse, fainting, vomiting blood, heavy ongoing bleeding, or new black tarry stools not explained by prescribed iron.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre the laboratories UKAS accredited and CQC registered?\u003c\/summary\u003e\n\u003cp\u003eSamples are processed through UKAS accredited laboratories within a CQC registered diagnostic pathway. Collection equipment is UKCA and CE marked and supported by an ISO 13485 quality management framework.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"iron_footer_note\"\u003e\n\u003ch3\u003eMedical guidance\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis iron profile cannot diagnose anaemia or identify the cause of an abnormal result by itself.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeek urgent help for chest pain, severe breathlessness, collapse, fainting, vomiting blood, heavy ongoing bleeding or new black tarry stools not explained by prescribed iron.\u003c\/p\u003e\n\u003cp\u003eShare low, high, persistent or discordant results with a GP. A full blood count, CRP, liver tests, kidney tests, bleeding assessment or genetic testing may be required.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/article\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":54410452500819,"sku":"487-blood-iron-test","price":79.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Iron_Blood_Test_UK_-_Ferritin_Iron_Profile.png?v=1785153771"},{"product_id":"vitamin-d","title":"Home Vitamin D Test Kit UK - Vitamin D Blood Test","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cmeta content=\"width=device-width, initial-scale=1\" name=\"viewport\"\u003e\u003cmeta content=\"Order a home vitamin D test kit in the UK. 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}\n\n    .vd_product { font-size: 15px; }\n\n    .vd_review_avatar {\n      flex-basis: 78px !important;\n      height: 78px !important;\n      max-height: 78px !important;\n      max-width: 78px !important;\n      min-height: 78px !important;\n      min-width: 78px !important;\n      width: 78px !important;\n    }\n  }\n\u003c\/style\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003carticle class=\"vd_product\"\u003e\n\u003csection class=\"vd_hero\"\u003e\n\u003cp class=\"vd_eyebrow\"\u003eAt home vitamin D blood test\u003c\/p\u003e\n\u003ch2\u003eHome Vitamin D Test Kit UK | Vitamin D Blood Test\u003c\/h2\u003e\n\u003cp class=\"vd_lead\"\u003e\u003cstrong\u003eA single biomarker home blood test measuring 25 hydroxyvitamin D to identify deficient, insufficient, sufficient or potentially excessive levels.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eVitamin D is a fat soluble vitamin that helps regulate calcium and phosphate and supports normal bones, teeth and muscles. The result should be interpreted with symptoms, supplement use, diet, sunlight exposure and relevant medical conditions.\u003c\/p\u003e\n\u003cdiv class=\"vd_grid\"\u003e\n\u003cdiv class=\"vd_stat\"\u003e\n\u003cstrong\u003e1 biomarker\u003c\/strong\u003e\u003cspan\u003eTotal 25 hydroxyvitamin D\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_stat\"\u003e\n\u003cstrong\u003eHome collection\u003c\/strong\u003e\u003cspan\u003eCapillary blood collected into the supplied microtainer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_stat\"\u003e\n\u003cstrong\u003eUK laboratory pathway\u003c\/strong\u003e\u003cspan\u003eUKAS accredited and CQC registered laboratory processing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_stat\"\u003e\n\u003cstrong\u003eProduct code\u003c\/strong\u003e\u003cspan\u003eC1BLP18100\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_notice\"\u003e\n\u003cstrong\u003eImportant UK testing context\u003c\/strong\u003e\n\u003cp\u003eNICE advises against routine vitamin D testing in people without symptoms. Testing is more useful when deficiency is suspected, relevant risk factors are present or treatment monitoring is clinically appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_warning\"\u003e\n\u003cstrong\u003eVitamin D and calcium supplements\u003c\/strong\u003e\n\u003cp\u003eTell the testing service about all vitamin D and calcium products, including prescribed loading doses and multivitamins. Do not increase or stop prescribed treatment without medical advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_section\"\u003e\n\u003cp class=\"vd_eyebrow\"\u003eQuality and compliance\u003c\/p\u003e\n\u003ch3\u003eHome testing supported by UK clinical standards\u003c\/h3\u003e\n\u003cdiv class=\"vd_trust_grid\"\u003e\n\u003cdiv class=\"vd_trust_item\"\u003e\n\u003cstrong\u003eUKAS accredited laboratories\u003c\/strong\u003e \u003cspan\u003eMedical laboratory accreditation assesses quality, competence and diagnostic performance.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_trust_item\"\u003e\n\u003cstrong\u003eCQC registered services\u003c\/strong\u003e \u003cspan\u003eThe diagnostic pathway uses organisations registered with the Care Quality Commission.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_trust_item\"\u003e\n\u003cstrong\u003eCompliant collection equipment\u003c\/strong\u003e \u003cspan\u003eUKCA and CE marked equipment supported by an ISO 13485 quality management framework.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_trust_item\"\u003e\n\u003cstrong\u003eSecure results\u003c\/strong\u003e \u003cspan\u003eClear collection guidance, secure result delivery and escalation support where required.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_section\"\u003e\n\u003ch3\u003eWhat does the vitamin D test measure?\u003c\/h3\u003e\n\u003cp\u003eThe laboratory measures total 25 hydroxyvitamin D, often written as 25(OH)D. This is the principal circulating form used to assess vitamin D status.\u003c\/p\u003e\n\u003cp\u003eThe result reflects vitamin D obtained from sunlight, food and supplements. It does not separately show whether vitamin D came from D2 or D3 unless a specialised fractionated test is used.\u003c\/p\u003e\n\u003cp\u003eVitamin D supports musculoskeletal health through calcium and phosphate regulation. The test should not be marketed as a diagnostic test for tiredness, depression, immune problems or a specific chronic disease because these symptoms and conditions have many possible causes.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_section\"\u003e\n\u003ch3\u003eHow common is low vitamin D in the UK?\u003c\/h3\u003e\n\u003cp\u003eThe UK National Diet and Nutrition Survey for 2019 to 2023 found vitamin D below 25 nmol\/L in 18% of adults aged 19 to 64 and 12% of adults aged 65 and over.\u003c\/p\u003e\n\u003cp\u003eVitamin D levels follow a strong seasonal pattern. Among people aged 11 and over, the percentage below 25 nmol\/L ranged from 21% to 38% during January to March and fell substantially during summer.\u003c\/p\u003e\n\u003cp\u003eThese figures are more reliable for current UK content than broad international estimates claiming that 30% or 40% of everyone is deficient.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_section\"\u003e\n\u003ch3\u003eWho may consider this test?\u003c\/h3\u003e\n\u003cp\u003eA home vitamin D blood test may be considered by adults who:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHave bone pain, muscle weakness or symptoms that a clinician believes may relate to deficiency\u003c\/li\u003e\n\u003cli\u003eHave little or no regular sunlight exposure\u003c\/li\u003e\n\u003cli\u003eHave darker skin, including African, African Caribbean or South Asian backgrounds\u003c\/li\u003e\n\u003cli\u003eWear clothing that covers most of the skin outdoors\u003c\/li\u003e\n\u003cli\u003eAre housebound or live in a care setting\u003c\/li\u003e\n\u003cli\u003eHave gastrointestinal disease, bariatric surgery or possible malabsorption\u003c\/li\u003e\n\u003cli\u003eHave liver or kidney disease requiring clinical monitoring\u003c\/li\u003e\n\u003cli\u003eTake anticonvulsants, glucocorticoids or other medicines affecting vitamin D\u003c\/li\u003e\n\u003cli\u003eAre monitoring prescribed vitamin D treatment\u003c\/li\u003e\n\u003cli\u003eHave been advised to test by a GP or another qualified clinician\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePregnancy, breastfeeding, kidney disease, sarcoidosis, parathyroid disorders, kidney stones and prescribed high dose vitamin D require individual clinical advice.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_section\"\u003e\n\u003ch3\u003eHow the home vitamin D test kit works\u003c\/h3\u003e\n\u003cdiv class=\"vd_steps\"\u003e\n\u003cdiv class=\"vd_step\"\u003e\n\u003cspan class=\"vd_step_number\"\u003e1\u003c\/span\u003e\n\u003ch4\u003eReview supplements\u003c\/h4\u003e\n\u003cp\u003eRecord vitamin D, calcium, multivitamins and prescribed loading doses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_step\"\u003e\n\u003cspan class=\"vd_step_number\"\u003e2\u003c\/span\u003e\n\u003ch4\u003eCollect and return\u003c\/h4\u003e\n\u003cp\u003eCollect capillary blood into the supplied microtainer and return it using the provided packaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_step\"\u003e\n\u003cspan class=\"vd_step_number\"\u003e3\u003c\/span\u003e\n\u003ch4\u003eReview the result\u003c\/h4\u003e\n\u003cp\u003eUse the laboratory reference interval and seek medical advice for low, high or unexpected results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_section\"\u003e\n\u003ch3\u003ePreparing for the test\u003c\/h3\u003e\n\u003cdiv class=\"vd_table_wrap\"\u003e\n\u003ctable class=\"vd_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePreparation\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFasting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFasting is not normally required for vitamin D alone. Follow the instructions supplied with the kit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVitamin D products\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord the brand, dose, frequency and timing of tablets, sprays, drops, injections and multivitamins.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCalcium supplements\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord calcium products because excess vitamin D can raise calcium and affect interpretation and safety.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrescribed treatment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDo not stop a loading course or maintenance dose without advice from the prescribing clinician.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMedical conditions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTell the provider about kidney or liver disease, sarcoidosis, parathyroid disease, malabsorption and kidney stones.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePregnancy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePregnancy and breastfeeding require appropriate supplementation and clinical interpretation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_section\"\u003e\n\u003ch3\u003eUnderstanding your vitamin D result\u003c\/h3\u003e\n\u003cp\u003eThe laboratory interval and comment printed on your individual report take priority. Thresholds may vary slightly between services.\u003c\/p\u003e\n\u003cdiv class=\"vd_table_wrap\"\u003e\n\u003ctable class=\"vd_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult category\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vd_status vd_critical\"\u003eSeverely deficient\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very low result may be associated with osteomalacia, bone pain, muscle weakness or disturbed calcium balance.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result promptly with a clinician so the cause, calcium status and treatment can be assessed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vd_status vd_low\"\u003eBelow 25 nmol\/L\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThis is regarded in UK guidance as vitamin D deficiency and is associated with increased risk of poor bone and muscle health.\u003c\/td\u003e\n\u003ctd\u003eDiscuss treatment and relevant risk factors with a doctor or pharmacist.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vd_status vd_info\"\u003e25 to 50 nmol\/L\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThis may be inadequate for some people, particularly where symptoms or risk factors are present.\u003c\/td\u003e\n\u003ctd\u003eReview diet, sunlight exposure, risk factors and appropriate supplementation with a healthcare professional.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vd_status vd_normal\"\u003eAbove 50 nmol\/L\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThis is sufficient for most people under current UK guidance.\u003c\/td\u003e\n\u003ctd\u003eMaintain sensible public health supplementation and avoid unnecessary high doses.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vd_status vd_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA high result is most commonly related to excessive supplementation. It may increase blood calcium.\u003c\/td\u003e\n\u003ctd\u003eStop non prescribed high dose supplements and arrange medical review.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vd_status vd_critical\"\u003eConsider toxicity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eVery high vitamin D may cause nausea, vomiting, thirst, frequent urination, weakness, confusion, kidney injury or abnormal heart rhythm.\u003c\/td\u003e\n\u003ctd\u003eSeek immediate medical advice and follow any urgent laboratory instruction.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_section\"\u003e\n\u003ch3\u003eVitamin D supplements in the UK\u003c\/h3\u003e\n\u003cp\u003eNHS advice is that adults and children over 4 should consider taking 10 micrograms, equivalent to 400 IU, of vitamin D each day during autumn and winter.\u003c\/p\u003e\n\u003cp\u003ePeople with little sunlight exposure and people with darker skin may be advised to consider the same daily dose throughout the year.\u003c\/p\u003e\n\u003cp\u003eThis public health dose is not the same as treatment for confirmed deficiency. High dose treatment should be clinically directed, particularly where calcium, kidney function or another medical condition may be relevant.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection id=\"content-standards\" class=\"vd_section\"\u003e\n\u003cp class=\"vd_eyebrow\"\u003eContent standards\u003c\/p\u003e\n\u003ch3\u003eHow this product information was prepared\u003c\/h3\u003e\n\u003cp\u003eThis page was prepared from the supplied vitamin D product details and expanded using current UK government, NHS and NICE information on testing, prevalence, thresholds, supplementation and toxicity.\u003c\/p\u003e\n\u003cdiv class=\"vd_method_grid\"\u003e\n\u003cdiv class=\"vd_method_item\"\u003e\n\u003cstrong\u003ePrimary product information\u003c\/strong\u003e \u003cspan\u003eThe supplied specimen type, biomarker, interpretation categories, medical guidance and product code.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_method_item\"\u003e\n\u003cstrong\u003eCurrent UK prevalence\u003c\/strong\u003e \u003cspan\u003eThe 2019 to 2023 National Diet and Nutrition Survey replaces broad and outdated international prevalence claims.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_method_item\"\u003e\n\u003cstrong\u003eClinical boundaries\u003c\/strong\u003e \u003cspan\u003eThe page distinguishes laboratory vitamin D status from diagnosis of tiredness, low mood, immune problems or chronic disease.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_method_item\"\u003e\n\u003cstrong\u003eReview policy\u003c\/strong\u003e \u003cspan\u003eMedical and editorial review at least annually and earlier when thresholds, supplementation guidance or laboratory standards change.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection id=\"medical-review\" class=\"vd_section\"\u003e\n\u003cp class=\"vd_eyebrow\"\u003eExpert review\u003c\/p\u003e\n\u003ch3\u003eMedical and editorial review\u003c\/h3\u003e\n\u003cp\u003eThis product information has been reviewed for vitamin D and supplement context, UK result interpretation, medical limitations and safety guidance.\u003c\/p\u003e\n\u003cp\u003eThe review applies to general product information. It is not personal medical advice and does not replace assessment of symptoms, calcium balance, kidney function or the cause of deficiency.\u003c\/p\u003e\n\u003cdiv class=\"vd_review_grid\"\u003e\n\u003carticle class=\"vd_review_card\"\u003e\n\u003cdiv class=\"vd_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"vd_review_avatar vd_review_avatar_rimas\" aria-label=\"Portrait of Dr Rimas Geiga\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"vd_review_label\"\u003eMedical review\u003c\/span\u003e\n\u003ch4 class=\"vd_review_name\"\u003eDr Rimas Geiga\u003c\/h4\u003e\n\u003cp class=\"vd_review_title\"\u003eMedical Doctor, Nutritional Sciences Adviser and Healthy Ageing Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vd_review_scope\"\u003eReviewed the vitamin D, nutritional sciences, supplementation, bone and muscle health and healthy ageing context.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/dr-rimas-geiga-medical-doctor-nutritional-sciences-adviser-and-healthy-ageing-expert\" class=\"vd_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003carticle class=\"vd_review_card\"\u003e\n\u003cdiv class=\"vd_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"vd_review_avatar vd_review_avatar_snieguole\" aria-label=\"Portrait of Dr Snieguole Geige\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"vd_review_label\"\u003eMedical review\u003c\/span\u003e\n\u003ch4 class=\"vd_review_name\"\u003eDr Snieguole Geige\u003c\/h4\u003e\n\u003cp class=\"vd_review_title\"\u003eDentist, Medical Doctor and Senior Adviser\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vd_review_scope\"\u003eReviewed the general medical boundaries, public health supplementation context, patient communication and guidance on when direct assessment is needed.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/dr-snieguole-geige-dentist-medical-doctor-and-senior-adviser\" class=\"vd_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003carticle class=\"vd_review_card\"\u003e\n\u003cdiv class=\"vd_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"vd_review_avatar vd_review_avatar_veronika\" aria-label=\"Portrait of Veronika Matutyte\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"vd_review_label\"\u003eClinical and safety review\u003c\/span\u003e\n\u003ch4 class=\"vd_review_name\"\u003eVeronika Matutyte\u003c\/h4\u003e\n\u003cp class=\"vd_review_title\"\u003eMedical Doctor and Healthcare Management Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vd_review_scope\"\u003eReviewed toxicity guidance, kidney and calcium considerations, urgent symptoms, clinical limitations and home testing safety.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/veronika-matutyte-medical-doctor-and-healthcare-management-expert\" class=\"vd_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vd_review_meta\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eLast medically reviewed\u003c\/strong\u003e \u003cspan\u003e26 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eReview cycle\u003c\/strong\u003e \u003cspan\u003eAt least once each year\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEarlier review\u003c\/strong\u003e \u003cspan\u003eWhen testing guidance, thresholds, supplementation advice or laboratory standards change\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vd_board_link\"\u003e\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/medical-advisory-board\"\u003eMeet the Grace Belgravia Medical Advisory Board\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_section vd_sources\"\u003e\n\u003cp class=\"vd_eyebrow\"\u003eFurther reading\u003c\/p\u003e\n\u003ch3\u003eAuthoritative UK vitamin D information\u003c\/h3\u003e\n\u003cp\u003eThese resources provide additional context. They do not replace the reference interval, comments or urgent instructions supplied with your laboratory report.\u003c\/p\u003e\n\u003cdetails\u003e\n\u003csummary\u003eView government, NHS and NICE references\u003c\/summary\u003e\n\u003cdiv class=\"vd_sources_body\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.gov.uk\/government\/statistics\/national-diet-and-nutrition-survey-2019-to-2023\/national-diet-and-nutrition-survey-2019-to-2023-report\"\u003eUK National Diet and Nutrition Survey 2019 to 2023\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nhs.uk\/conditions\/vitamins-and-minerals\/vitamin-d\/\"\u003eNHS vitamin D guidance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cks.nice.org.uk\/topics\/vitamin-d-deficiency-in-adults\/diagnosis\/diagnosis\/\"\u003eNICE vitamin D testing guidance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cks.nice.org.uk\/topics\/vitamin-d-deficiency-in-adults\/\"\u003eNICE vitamin D thresholds and risk factors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.gov.uk\/guidance\/vitamin-d-deficiency-migrant-health-guide\"\u003eUK government vitamin D deficiency and supplementation guidance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/labtestsonline.org.uk\/tests\/vitamin-d\"\u003eAssociation for Laboratory Medicine vitamin D testing information\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.ukas.com\/accreditation\/standards\/medical-laboratory-accreditation\/\"\u003eUKAS medical laboratory accreditation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.cqc.org.uk\/guidance-regulation\/providers\/registration\/scope-registration\/regulated-activities\/diagnostic-and-screening-procedures\"\u003eCQC diagnostic and screening services guidance\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_section vd_faq\"\u003e\n\u003cp class=\"vd_eyebrow\"\u003eSearch led questions\u003c\/p\u003e\n\u003ch3\u003eHome vitamin D test kit FAQs\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I test my vitamin D level at home?\u003c\/summary\u003e\n\u003cp\u003eYes. This kit uses a capillary blood sample collected at home and returned for laboratory analysis. It measures 25 hydroxyvitamin D, the main blood marker used to assess vitamin D status.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does a vitamin D blood test measure?\u003c\/summary\u003e\n\u003cp\u003eThe test measures total 25 hydroxyvitamin D in the blood. This reflects vitamin D obtained from sunlight, food and supplements.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is a normal vitamin D level in the UK?\u003c\/summary\u003e\n\u003cp\u003eCurrent UK guidance generally regards a result above 50 nmol\/L as sufficient for most people. The reference interval and comment on your laboratory report take priority.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat vitamin D level is deficient?\u003c\/summary\u003e\n\u003cp\u003eA 25 hydroxyvitamin D result below 25 nmol\/L is regarded in UK guidance as deficient and is associated with increased risk of poor bone and muscle health.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does an insufficient vitamin D result mean?\u003c\/summary\u003e\n\u003cp\u003eA result from 25 to 50 nmol\/L may be inadequate for some people. The appropriate next step depends on symptoms, risk factors, calcium intake, medical history and supplement use.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan vitamin D levels be too high?\u003c\/summary\u003e\n\u003cp\u003eYes. Excess vitamin D is usually caused by taking too much from supplements or prescribed products. It can increase calcium and affect the kidneys, heart, muscles and nervous system.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to fast for a vitamin D test?\u003c\/summary\u003e\n\u003cp\u003eFasting is not normally required for a vitamin D test on its own. Follow the specific instructions supplied with the kit.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I stop vitamin D supplements before testing?\u003c\/summary\u003e\n\u003cp\u003eDo not stop prescribed treatment without medical advice. Record the product, dose and timing of vitamin D, calcium and multivitamin supplements because these affect interpretation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow common is low vitamin D in the UK?\u003c\/summary\u003e\n\u003cp\u003eThe UK National Diet and Nutrition Survey for 2019 to 2023 found vitamin D below 25 nmol\/L in 18% of adults aged 19 to 64 and 12% of adults aged 65 and over. Rates were higher during January to March.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWho is at higher risk of vitamin D deficiency?\u003c\/summary\u003e\n\u003cp\u003eRisk is higher in people with little sunlight exposure, darker skin, clothing that covers most of the skin, housebound living, malabsorption, liver or kidney disease and some medicines.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat are the symptoms of vitamin D deficiency?\u003c\/summary\u003e\n\u003cp\u003eMany people have no clear symptoms. Severe deficiency may cause bone pain, muscle weakness or osteomalacia. Tiredness and general aches are non specific and may have other causes.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan vitamin D deficiency cause tiredness or low mood?\u003c\/summary\u003e\n\u003cp\u003eLow vitamin D can coexist with tiredness or low mood, but these symptoms have many possible causes. A vitamin D result cannot establish that deficiency is the cause.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the NHS recommend vitamin D supplements?\u003c\/summary\u003e\n\u003cp\u003eNHS advice is that adults and children over 4 should consider 10 micrograms of vitamin D daily during autumn and winter. People at higher risk may be advised to take it throughout the year.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould everyone have a vitamin D blood test?\u003c\/summary\u003e\n\u003cp\u003eNo. NICE advises against routine testing in people without symptoms. Testing may be useful when deficiency is suspected, symptoms or risk factors are present, or treatment monitoring is clinically appropriate.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow often should vitamin D be retested?\u003c\/summary\u003e\n\u003cp\u003eRetesting depends on the original result, treatment, symptoms and clinical context. Vitamin D changes slowly, so repeat testing is usually timed by a clinician rather than performed frequently.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen is a high vitamin D result urgent?\u003c\/summary\u003e\n\u003cp\u003eSeek prompt medical advice for a very high result or symptoms such as persistent vomiting, marked thirst, frequent urination, severe weakness, confusion, dehydration, kidney pain or an abnormal heart rhythm.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre the laboratories UKAS accredited and CQC registered?\u003c\/summary\u003e\n\u003cp\u003eSamples are processed through UKAS accredited laboratories within a CQC registered diagnostic pathway. Collection equipment is UKCA and CE marked and supported by an ISO 13485 quality management framework.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"vd_footer_note\"\u003e\n\u003ch3\u003eMedical guidance\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo not wait for a home test if symptoms feel urgent.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeek prompt medical advice for severe weakness, confusion, persistent vomiting, marked thirst, frequent urination, dehydration, severe bone pain, kidney pain, collapse or an abnormal heart rhythm.\u003c\/p\u003e\n\u003cp\u003eThis product measures one vitamin D biomarker. It cannot diagnose the cause of symptoms, calcium disorders, kidney disease, osteomalacia or another medical condition without wider assessment.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/article\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":54410456990035,"sku":"492-vitamin-d","price":89.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Vitamin_D_Test_Kit_UK_-_Vitamin_D_Blood_Test_44bd2a2e-e600-46ae-a4b9-dbbf5f1ea324.png?v=1785151119"},{"product_id":"vitamins-minerals","title":"Home Vitamin Deficiency Test Kit UK - Vitamins, Minerals \u0026 Iron","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cmeta content=\"width=device-width, initial-scale=1\" name=\"viewport\"\u003e\u003cmeta content=\"Order a home vitamin deficiency test kit in the UK. 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}\n\n    .vm_review_avatar {\n      flex-basis: 78px !important;\n      height: 78px !important;\n      max-height: 78px !important;\n      max-width: 78px !important;\n      min-height: 78px !important;\n      min-width: 78px !important;\n      width: 78px !important;\n    }\n  }\n\u003c\/style\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003carticle class=\"vm_product\"\u003e\n\u003csection class=\"vm_hero\"\u003e\n\u003cp class=\"vm_eyebrow\"\u003eAt home vitamin, mineral and iron blood test\u003c\/p\u003e\n\u003ch2\u003eHome Vitamin Deficiency Test Kit UK | Vitamins, Minerals \u0026amp; Iron\u003c\/h2\u003e\n\u003cp class=\"vm_lead\"\u003e\u003cstrong\u003eA 9 biomarker home blood test covering vitamin D, active vitamin B12, folate, magnesium and a detailed iron profile.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe panel provides selected nutritional marker context relevant to blood health, bones, muscles, nerves and general wellbeing. It combines vitamin and mineral markers with ferritin, serum iron, TIBC, UIBC and transferrin saturation.\u003c\/p\u003e\n\u003cdiv class=\"vm_grid\"\u003e\n\u003cdiv class=\"vm_stat\"\u003e\n\u003cstrong\u003e9 biomarkers\u003c\/strong\u003e\u003cspan\u003eVitamins, magnesium and a detailed iron profile\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_stat\"\u003e\n\u003cstrong\u003eHome collection\u003c\/strong\u003e\u003cspan\u003eCapillary blood collected into the supplied microtainer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_stat\"\u003e\n\u003cstrong\u003eUK laboratory pathway\u003c\/strong\u003e\u003cspan\u003eUKAS accredited and CQC registered laboratory processing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_stat\"\u003e\n\u003cstrong\u003eProduct code\u003c\/strong\u003e\u003cspan\u003eC1BLP18200\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_notice\"\u003e\n\u003cstrong\u003eImportant limitation\u003c\/strong\u003e\n\u003cp\u003eThis test does not diagnose anaemia, malabsorption, iron overload or the cause of a low nutrient result by itself. It does not include a full blood count, inflammatory markers or every vitamin and mineral.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_warning\"\u003e\n\u003cstrong\u003eDo not wait for test results if symptoms feel urgent\u003c\/strong\u003e\n\u003cp\u003eSeek prompt medical help for severe weakness, chest pain, severe breathlessness, collapse, confusion, seizures, new numbness, walking difficulty, black stools, visible blood loss or severe persistent vomiting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vm_section\"\u003e\n\u003cp class=\"vm_eyebrow\"\u003eQuality and compliance\u003c\/p\u003e\n\u003ch3\u003eHome testing supported by UK clinical standards\u003c\/h3\u003e\n\u003cdiv class=\"vm_trust_grid\"\u003e\n\u003cdiv class=\"vm_trust_item\"\u003e\n\u003cstrong\u003eUKAS accredited laboratories\u003c\/strong\u003e \u003cspan\u003eMedical laboratory accreditation assesses quality, competence and diagnostic performance.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_trust_item\"\u003e\n\u003cstrong\u003eCQC registered services\u003c\/strong\u003e \u003cspan\u003eThe diagnostic pathway uses organisations registered with the Care Quality Commission.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_trust_item\"\u003e\n\u003cstrong\u003eCompliant collection equipment\u003c\/strong\u003e \u003cspan\u003eUKCA and CE marked equipment supported by an ISO 13485 quality management framework.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_trust_item\"\u003e\n\u003cstrong\u003eSecure results\u003c\/strong\u003e \u003cspan\u003eClear collection guidance, secure result delivery and escalation support where required.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vm_section\"\u003e\n\u003ch3\u003eWhat this vitamin deficiency test kit measures\u003c\/h3\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eHealth area\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eBiomarkers\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat they may help show\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVitamin status\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 hydroxyvitamin D, active vitamin B12 and serum folate\u003c\/td\u003e\n\u003ctd\u003eSelected vitamin markers relevant to bone, muscle, nerve and red blood cell health.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMineral status\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSerum magnesium\u003c\/td\u003e\n\u003ctd\u003eThe amount of magnesium circulating in the blood at the time of testing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIron stores\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFerritin\u003c\/td\u003e\n\u003ctd\u003eA principal marker of stored iron, with important limitations during inflammation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIron transport and availability\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSerum iron, TIBC, UIBC and transferrin saturation\u003c\/td\u003e\n\u003ctd\u003eA broader view of circulating iron, binding capacity and transferrin occupancy.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vm_section\"\u003e\n\u003ch3\u003eWho may consider this test?\u003c\/h3\u003e\n\u003cp\u003eThis panel may be considered by adults who want to review selected nutritional markers in the context of:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePersistent tiredness, weakness or reduced energy\u003c\/li\u003e\n\u003cli\u003eA restrictive, vegan or vegetarian diet\u003c\/li\u003e\n\u003cli\u003eHeavy menstrual bleeding or previous low iron stores\u003c\/li\u003e\n\u003cli\u003eLimited sunlight exposure or increased vitamin D risk\u003c\/li\u003e\n\u003cli\u003eMuscle cramps, weakness or possible magnesium concerns\u003c\/li\u003e\n\u003cli\u003eLong term proton pump inhibitor, metformin or other medicine use\u003c\/li\u003e\n\u003cli\u003eGastrointestinal disease, surgery or possible malabsorption\u003c\/li\u003e\n\u003cli\u003eMonitoring requested by a GP or another qualified clinician\u003c\/li\u003e\n\u003cli\u003eReviewing supplements before increasing the dose\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePregnancy, breastfeeding, known kidney disease, an iron overload condition or prescribed high dose supplementation require individual clinical advice.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"vm_section\"\u003e\n\u003ch3\u003eHow the home vitamin and mineral test works\u003c\/h3\u003e\n\u003cdiv class=\"vm_steps\"\u003e\n\u003cdiv class=\"vm_step\"\u003e\n\u003cspan class=\"vm_step_number\"\u003e1\u003c\/span\u003e\n\u003ch4\u003eReview supplements and medicines\u003c\/h4\u003e\n\u003cp\u003eRecord vitamins, minerals, iron, injections and medicines that may affect the results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_step\"\u003e\n\u003cspan class=\"vm_step_number\"\u003e2\u003c\/span\u003e\n\u003ch4\u003eCollect and return\u003c\/h4\u003e\n\u003cp\u003eCollect capillary blood into the supplied microtainer and return it using the provided packaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_step\"\u003e\n\u003cspan class=\"vm_step_number\"\u003e3\u003c\/span\u003e\n\u003ch4\u003eReview the complete pattern\u003c\/h4\u003e\n\u003cp\u003eUse the laboratory reference intervals and discuss low, high or discordant results with a clinician.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vm_section\"\u003e\n\u003ch3\u003ePreparing for the test\u003c\/h3\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePreparation\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFasting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFollow the kit instructions. Serum iron can vary with meals, so morning collection before food may be recommended for consistency.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupplements\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord vitamin D, B12, folic acid, iron, magnesium, multivitamins and recent injections. Do not stop prescribed treatment without advice.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecent iron treatment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIron tablets, infusions, transfusions and injections can affect serum iron, ferritin and transferrin saturation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInflammation or infection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFerritin may rise and serum iron may fall during inflammation. A clinician may recommend CRP or repeat testing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMedicines\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord metformin, proton pump inhibitors, anticonvulsants, methotrexate, diuretics, antacids and laxatives.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKidney disease\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKidney function affects magnesium and the interpretation of iron markers. Seek clinical advice before changing supplements.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePregnancy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePregnancy changes nutrient requirements and reference intervals. Results should be reviewed by a midwife, GP or obstetric team.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vm_section\"\u003e\n\u003ch3\u003eUnderstanding the iron profile\u003c\/h3\u003e\n\u003cp\u003eIron markers should be interpreted as a pattern. The examples below are simplified and do not replace clinical assessment.\u003c\/p\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePossible pattern\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMarkers that may be seen\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eImportant qualification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDepleted iron stores\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLow ferritin, low TSAT, lower serum iron and higher TIBC or UIBC.\u003c\/td\u003e\n\u003ctd\u003eA full blood count is required to determine whether anaemia is present.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInflammation related pattern\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNormal or high ferritin with low serum iron, low TSAT and low or normal TIBC.\u003c\/td\u003e\n\u003ctd\u003eFerritin may be raised by inflammation and can mask iron deficiency.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePossible iron overload\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRaised serum iron or TSAT with low or normal TIBC, sometimes with raised ferritin.\u003c\/td\u003e\n\u003ctd\u003eRepeat fasting tests, liver tests and genetic assessment may be required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecent supplementation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTemporarily raised serum iron or TSAT, with ferritin depending on longer term stores.\u003c\/td\u003e\n\u003ctd\u003eRecord the dose and timing before collection.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"vm_section\"\u003e\n\u003ch3\u003eBiomarkers and result interpretation\u003c\/h3\u003e\n\u003cp\u003eSelect each marker to read what it measures, preparation guidance and how low, normal, high or indeterminate results may be considered.\u003c\/p\u003e\n\u003cdetails class=\"vm_biomarker\"\u003e\n\u003csummary\u003eTransferrin saturation\u003c\/summary\u003e\n\u003cdiv class=\"vm_biomarker_body\"\u003e\n\u003cp\u003eTransferrin saturation, often shortened to TSAT, estimates the percentage of iron binding sites on transferrin that are occupied. It is calculated from serum iron and TIBC.\u003c\/p\u003e\n\u003cp\u003eLow TSAT may support iron deficiency, while a persistently high result may require assessment for iron overload. It should be interpreted with ferritin, TIBC, UIBC, inflammation, liver health and any supplement use.\u003c\/p\u003e\n\u003cdiv class=\"vm_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eRecord iron tablets, multivitamins, injections and recent transfusions. Serum iron can vary with meals and time of day, so follow the collection instructions. Do not stop prescribed iron without medical advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA low result may occur with iron deficiency, chronic blood loss, poor absorption, inflammation or increased iron requirements.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the complete iron pattern with a GP. A full blood count may also be required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eInterpret it with ferritin and the other iron studies.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA high result may occur with excessive supplementation, recent iron treatment, hereditary haemochromatosis, liver disease or other causes.\u003c\/td\u003e\n\u003ctd\u003eDiscuss a persistent or unexplained result with a clinician.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"vm_biomarker\"\u003e\n\u003csummary\u003eActive vitamin B12\u003c\/summary\u003e\n\u003cdiv class=\"vm_biomarker_body\"\u003e\n\u003cp\u003eActive vitamin B12, also called holotranscobalamin, measures the portion of vitamin B12 available for cells to use. Vitamin B12 supports normal red blood cell formation and neurological function.\u003c\/p\u003e\n\u003cp\u003eLow levels may be related to autoimmune gastritis, diet, gastrointestinal disease, surgery, metformin, proton pump inhibitors, nitrous oxide exposure or other causes. Neurological symptoms can occur without anaemia.\u003c\/p\u003e\n\u003cdiv class=\"vm_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eRecord vitamin B12 tablets, fortified products, injections, metformin, proton pump inhibitors and nitrous oxide use. Do not delay medical care for neurological symptoms.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eAn active B12 result below 25 pmol\/L is consistent with vitamin B12 deficiency under NICE guidance.\u003c\/td\u003e\n\u003ctd\u003eArrange GP review, particularly if numbness, balance problems, memory changes or weakness are present.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_info\"\u003eIndeterminate\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eAn active B12 result from 25 to 70 pmol\/L is considered indeterminate and possible deficiency remains.\u003c\/td\u003e\n\u003ctd\u003eA clinician may consider symptoms, risk factors and further testing such as methylmalonic acid.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA result above 70 pmol\/L makes vitamin B12 deficiency less likely.\u003c\/td\u003e\n\u003ctd\u003ePersistent symptoms still need a wider medical assessment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh active B12 commonly reflects supplements or injections. Unexplained elevation may also occur with liver, kidney or blood conditions.\u003c\/td\u003e\n\u003ctd\u003eDiscuss an unexplained high result with your GP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"vm_biomarker\"\u003e\n\u003csummary\u003eFerritin\u003c\/summary\u003e\n\u003cdiv class=\"vm_biomarker_body\"\u003e\n\u003cp\u003eFerritin is the main laboratory marker used to estimate stored iron. A low result strongly supports depleted iron stores.\u003c\/p\u003e\n\u003cp\u003eFerritin is also an acute phase protein and may rise during inflammation, infection, liver disease and other conditions. A normal or high result can therefore sometimes mask iron deficiency.\u003c\/p\u003e\n\u003cdiv class=\"vm_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eRecord iron tablets, multivitamins, injections and recent transfusions. Serum iron can vary with meals and time of day, so follow the collection instructions. Do not stop prescribed iron without medical advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eLow ferritin indicates depleted iron stores. NICE guidance states that a result below 30 micrograms per litre confirms iron deficiency in adults.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the cause with a GP. Blood loss, diet, absorption and a full blood count may need assessment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within the reference interval.\u003c\/td\u003e\n\u003ctd\u003eConsider it with symptoms, TSAT, inflammation and the full blood count where available.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh ferritin may occur with inflammation, infection, liver disease, alcohol use, metabolic conditions, iron overload or supplementation.\u003c\/td\u003e\n\u003ctd\u003eDo not assume iron overload from ferritin alone. Discuss the pattern with a clinician.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"vm_biomarker\"\u003e\n\u003csummary\u003eSerum iron\u003c\/summary\u003e\n\u003cdiv class=\"vm_biomarker_body\"\u003e\n\u003cp\u003eSerum iron measures the amount of iron circulating in the blood at the time of collection. Iron is needed to produce haemoglobin, but serum iron varies with meals, time of day, supplements and illness.\u003c\/p\u003e\n\u003cp\u003eIt should not be used alone to diagnose iron deficiency or haemochromatosis.\u003c\/p\u003e\n\u003cdiv class=\"vm_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eRecord iron tablets, multivitamins, injections and recent transfusions. Serum iron can vary with meals and time of day, so follow the collection instructions. Do not stop prescribed iron without medical advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eLow serum iron may occur with iron deficiency, inflammation, chronic illness, blood loss or poor absorption.\u003c\/td\u003e\n\u003ctd\u003eInterpret it with ferritin, TIBC, UIBC, TSAT and a full blood count.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within the laboratory interval.\u003c\/td\u003e\n\u003ctd\u003eA normal serum iron result does not exclude depleted iron stores.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh serum iron may reflect recent supplements, iron treatment, transfusion, liver disease, haemolysis or iron overload.\u003c\/td\u003e\n\u003ctd\u003eDiscuss an unexpected result with a clinician.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"vm_biomarker\" open=\"\"\u003e\n\u003csummary\u003e25 hydroxyvitamin D\u003c\/summary\u003e\n\u003cdiv class=\"vm_biomarker_body\"\u003e\n\u003cp\u003e25 hydroxyvitamin D is the principal blood marker used to assess vitamin D status. Vitamin D supports calcium and phosphate regulation and normal bones, teeth and muscles.\u003c\/p\u003e\n\u003cp\u003eLow levels are more common during autumn and winter, with limited sunlight exposure, darker skin, covering most of the skin, poor absorption or increased requirements.\u003c\/p\u003e\n\u003cdiv class=\"vm_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eRecord vitamin D supplements, multivitamins, prescribed loading doses and calcium supplements. Tell the provider about kidney disease, sarcoidosis, parathyroid conditions and pregnancy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_critical\"\u003eSeverely deficient\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very low result requires assessment of the cause and any related bone, muscle or calcium problems.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result promptly with a clinician.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_low\"\u003eDeficient\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eBelow 25 nmol\/L is generally regarded in UK guidance as deficient.\u003c\/td\u003e\n\u003ctd\u003eDiscuss treatment and the reason for deficiency with a doctor or pharmacist.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_low\"\u003eInsufficient\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA result from 25 to 50 nmol\/L may be inadequate for some people.\u003c\/td\u003e\n\u003ctd\u003eReview risk factors, diet, sunlight exposure and suitable supplementation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eAdequate\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eAbove 50 nmol\/L is sufficient for most people according to current UK laboratory guidance.\u003c\/td\u003e\n\u003ctd\u003eAvoid unnecessary high dose supplementation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eMaintain sensible dietary and supplementation measures.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eOptimal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within a range described as favourable by the reporting laboratory.\u003c\/td\u003e\n\u003ctd\u003eMore is not necessarily better. Avoid excessive doses.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh vitamin D is usually caused by excessive supplementation and may raise calcium.\u003c\/td\u003e\n\u003ctd\u003eStop non prescribed high dose supplements and arrange medical review.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_critical\"\u003eConsider toxicity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eVery high vitamin D may cause nausea, thirst, frequent urination, weakness, confusion, kidney problems and abnormal heart rhythm.\u003c\/td\u003e\n\u003ctd\u003eSeek immediate medical advice.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"vm_biomarker\"\u003e\n\u003csummary\u003eMagnesium\u003c\/summary\u003e\n\u003cdiv class=\"vm_biomarker_body\"\u003e\n\u003cp\u003eMagnesium supports normal nerve, muscle, heart and bone function. This test measures magnesium circulating in serum or plasma.\u003c\/p\u003e\n\u003cp\u003eMost magnesium is stored inside cells and bones, so a normal serum result does not exclude every magnesium related problem. Kidney function and medicines are important when interpreting high or low levels.\u003c\/p\u003e\n\u003cdiv class=\"vm_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eFasting is not usually required. Record magnesium supplements, antacids, laxatives, proton pump inhibitors, diuretics and kidney disease.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eSevere hypomagnesaemia can cause seizures, muscle spasm and abnormal heart rhythms. UK guidance commonly regards below 0.5 mmol\/L as severe.\u003c\/td\u003e\n\u003ctd\u003eSeek urgent medical review.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eBelow the laboratory range may occur with poor intake, diarrhoea, malabsorption, alcohol use, diuretics, proton pump inhibitors or kidney losses.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result with your GP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA typical adult serum reference interval is approximately 0.7 to 1.0 mmol\/L, although the reporting laboratory range takes priority.\u003c\/td\u003e\n\u003ctd\u003ePersistent symptoms may need wider electrolyte and medical assessment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh magnesium is uncommon and may occur with kidney impairment or excessive magnesium containing medicines and supplements.\u003c\/td\u003e\n\u003ctd\u003eStop non prescribed magnesium and discuss the result with a clinician.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very high result can affect breathing, blood pressure, consciousness and heart rhythm.\u003c\/td\u003e\n\u003ctd\u003eSeek urgent medical review.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"vm_biomarker\"\u003e\n\u003csummary\u003eTotal iron binding capacity\u003c\/summary\u003e\n\u003cdiv class=\"vm_biomarker_body\"\u003e\n\u003cp\u003eTotal iron binding capacity, known as TIBC, estimates how much iron the proteins in the blood could bind. It mainly reflects transferrin, the principal iron transport protein.\u003c\/p\u003e\n\u003cp\u003eTIBC often rises when iron stores are low. It may be lower with inflammation, liver disease, poor nutrition or iron overload.\u003c\/p\u003e\n\u003cdiv class=\"vm_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eRecord iron tablets, multivitamins, injections and recent transfusions. Serum iron can vary with meals and time of day, so follow the collection instructions. Do not stop prescribed iron without medical advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eLow TIBC may occur with inflammation, liver disease, poor nutrition, kidney disease or iron overload.\u003c\/td\u003e\n\u003ctd\u003eInterpret it with ferritin, serum iron and TSAT.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eReview the complete iron pattern rather than TIBC alone.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh TIBC commonly occurs when iron stores are depleted and may also be influenced by pregnancy or oestrogen treatment.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result with a GP if ferritin or TSAT is also low.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"vm_biomarker\"\u003e\n\u003csummary\u003eUnsaturated iron binding capacity\u003c\/summary\u003e\n\u003cdiv class=\"vm_biomarker_body\"\u003e\n\u003cp\u003eUnsaturated iron binding capacity, known as UIBC, estimates the amount of transferrin binding capacity that is not currently occupied by iron.\u003c\/p\u003e\n\u003cp\u003eUIBC is used with serum iron to calculate TIBC and transferrin saturation. It is most useful as part of the complete iron profile.\u003c\/p\u003e\n\u003cdiv class=\"vm_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eRecord iron tablets, multivitamins, injections and recent transfusions. Serum iron can vary with meals and time of day, so follow the collection instructions. Do not stop prescribed iron without medical advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eLow UIBC may occur when more binding sites are occupied, including with high serum iron, recent supplementation or possible iron overload. It may also fall with low transferrin.\u003c\/td\u003e\n\u003ctd\u003eInterpret it with ferritin, serum iron and TSAT.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eConsider the overall iron pattern.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh UIBC may occur when many binding sites remain unoccupied, which is commonly seen with low iron stores.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the complete iron profile with a GP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"vm_biomarker\"\u003e\n\u003csummary\u003eSerum folate\u003c\/summary\u003e\n\u003cdiv class=\"vm_biomarker_body\"\u003e\n\u003cp\u003eFolate, also called vitamin B9, supports cell division and normal red blood cell production. Serum folate is influenced by recent diet and supplementation.\u003c\/p\u003e\n\u003cp\u003eLow folate may reflect poor intake, alcohol use, increased requirements, malabsorption or medicines. Vitamin B12 status should be considered before high dose folic acid treatment because folic acid can improve anaemia while neurological B12 complications continue.\u003c\/p\u003e\n\u003cdiv class=\"vm_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eRecord folic acid, pregnancy vitamins, anticonvulsants, methotrexate and recent dietary supplements. People trying to conceive should follow current UK folic acid advice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"vm_table_wrap\"\u003e\n\u003ctable class=\"vm_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very low result may be associated with significant deficiency, poor intake, malabsorption, pregnancy related demand, alcohol use or medicine effects.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result promptly with a doctor.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eLow folate may contribute to abnormal red blood cell formation and symptoms such as tiredness, weakness or a sore tongue.\u003c\/td\u003e\n\u003ctd\u003eSee your GP to assess the cause and check vitamin B12 and a full blood count.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003ePersistent symptoms still require wider assessment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh folate most commonly reflects folic acid supplements or fortified foods.\u003c\/td\u003e\n\u003ctd\u003eReview supplement use and ensure vitamin B12 has been assessed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"vm_status vm_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA markedly high result may reflect prolonged high dose folic acid use. The clinical importance depends on vitamin B12 status and symptoms.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result and supplement dose with a doctor.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection id=\"content-standards\" class=\"vm_section\"\u003e\n\u003cp class=\"vm_eyebrow\"\u003eContent standards\u003c\/p\u003e\n\u003ch3\u003eHow this product information was prepared\u003c\/h3\u003e\n\u003cp\u003eThis page was prepared from the supplied nine marker product specification and expanded using current UK guidance on vitamin B12, vitamin D, iron studies, folate, magnesium and accredited laboratory testing.\u003c\/p\u003e\n\u003cdiv class=\"vm_method_grid\"\u003e\n\u003cdiv class=\"vm_method_item\"\u003e\n\u003cstrong\u003ePrimary product source\u003c\/strong\u003e \u003cspan\u003eThe supplied biomarkers, preparation information, clinical limits, result categories and product code.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_method_item\"\u003e\n\u003cstrong\u003eUK clinical references\u003c\/strong\u003e \u003cspan\u003eNICE and NHS laboratory guidance used for active B12, vitamin D, magnesium and iron interpretation.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_method_item\"\u003e\n\u003cstrong\u003eClinical boundaries\u003c\/strong\u003e \u003cspan\u003eThe page distinguishes selected nutrient markers from a diagnosis of anaemia, malabsorption or iron overload.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_method_item\"\u003e\n\u003cstrong\u003eReview policy\u003c\/strong\u003e \u003cspan\u003eMedical and editorial review at least annually and earlier when biomarkers, laboratory methods or UK guidance changes.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection id=\"medical-review\" class=\"vm_section\"\u003e\n\u003cp class=\"vm_eyebrow\"\u003eExpert review\u003c\/p\u003e\n\u003ch3\u003eMedical and editorial review\u003c\/h3\u003e\n\u003cp\u003eThis product information has been reviewed for nutritional and iron marker context, preparation guidance, medical limitations, patient safety and responsible interpretation.\u003c\/p\u003e\n\u003cp\u003eThe review applies to general product information. It is not personal medical advice and does not replace a GP assessment, full blood count or investigation of the cause of an abnormal result.\u003c\/p\u003e\n\u003cdiv class=\"vm_review_grid\"\u003e\n\u003carticle class=\"vm_review_card\"\u003e\n\u003cdiv class=\"vm_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"vm_review_avatar vm_review_avatar_rimas\" aria-label=\"Portrait of Dr Rimas Geiga\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"vm_review_label\"\u003eMedical review\u003c\/span\u003e\n\u003ch4 class=\"vm_review_name\"\u003eDr Rimas Geiga\u003c\/h4\u003e\n\u003cp class=\"vm_review_title\"\u003eMedical Doctor, Nutritional Sciences Adviser and Healthy Ageing Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vm_review_scope\"\u003eReviewed the vitamin, magnesium, iron, nutritional sciences and responsible supplementation context.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/dr-rimas-geiga-medical-doctor-nutritional-sciences-adviser-and-healthy-ageing-expert\" class=\"vm_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003carticle class=\"vm_review_card\"\u003e\n\u003cdiv class=\"vm_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"vm_review_avatar vm_review_avatar_snieguole\" aria-label=\"Portrait of Dr Snieguole Geige\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"vm_review_label\"\u003eMedical review\u003c\/span\u003e\n\u003ch4 class=\"vm_review_name\"\u003eDr Snieguole Geige\u003c\/h4\u003e\n\u003cp class=\"vm_review_title\"\u003eDentist, Medical Doctor and Senior Adviser\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vm_review_scope\"\u003eReviewed the general medical boundaries, neurological symptom guidance, patient communication and advice on when direct clinical assessment is required.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/dr-snieguole-geige-dentist-medical-doctor-and-senior-adviser\" class=\"vm_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003carticle class=\"vm_review_card\"\u003e\n\u003cdiv class=\"vm_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"vm_review_avatar vm_review_avatar_veronika\" aria-label=\"Portrait of Veronika Matutyte\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"vm_review_label\"\u003eClinical and safety review\u003c\/span\u003e\n\u003ch4 class=\"vm_review_name\"\u003eVeronika Matutyte\u003c\/h4\u003e\n\u003cp class=\"vm_review_title\"\u003eMedical Doctor and Healthcare Management Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vm_review_scope\"\u003eReviewed urgent symptom guidance, kidney and medicine considerations, clinical limitations and the safety of the home testing pathway.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/veronika-matutyte-medical-doctor-and-healthcare-management-expert\" class=\"vm_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vm_review_meta\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eLast medically reviewed\u003c\/strong\u003e \u003cspan\u003e26 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eReview cycle\u003c\/strong\u003e \u003cspan\u003eAt least once each year\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEarlier review\u003c\/strong\u003e \u003cspan\u003eWhen laboratory methods, biomarker guidance, collection standards or safety advice changes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"vm_board_link\"\u003e\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/medical-advisory-board\"\u003eMeet the Grace Belgravia Medical Advisory Board\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"vm_section vm_sources\"\u003e\n\u003cp class=\"vm_eyebrow\"\u003eFurther reading\u003c\/p\u003e\n\u003ch3\u003eAuthoritative UK vitamin, mineral and iron information\u003c\/h3\u003e\n\u003cp\u003eThese resources provide additional context. They do not replace the instructions, units, reference intervals or comments supplied with your laboratory report.\u003c\/p\u003e\n\u003cdetails\u003e\n\u003csummary\u003eView NICE and NHS laboratory references\u003c\/summary\u003e\n\u003cdiv class=\"vm_sources_body\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nice.org.uk\/guidance\/ng239\/chapter\/recommendations\"\u003eNICE vitamin B12 deficiency guidance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.gloshospitals.nhs.uk\/our-services\/services-we-offer\/pathology\/tests-and-investigations\/active-b12-holotranscobalamin\/\"\u003eNHS active vitamin B12 interpretation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nhs.uk\/tests-and-treatments\/tibc-test\/\"\u003eNHS TIBC and transferrin information\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cks.nice.org.uk\/topics\/anaemia-iron-deficiency\/\"\u003eNICE iron deficiency guidance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.gloshospitals.nhs.uk\/our-services\/services-we-offer\/pathology\/tests-and-investigations\/25-hydroxyvitamin-d\/\"\u003eNHS 25 hydroxyvitamin D thresholds\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.gloshospitals.nhs.uk\/our-services\/services-we-offer\/pathology\/tests-and-investigations\/magnesium-mg\/\"\u003eNHS magnesium reference information\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nhs.uk\/conditions\/vitamin-b12-or-folate-deficiency-anaemia\/diagnosis\/\"\u003eNHS vitamin B12 and folate deficiency diagnosis\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.ukas.com\/accreditation\/standards\/medical-laboratory-accreditation\/\"\u003eUKAS medical laboratory accreditation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.cqc.org.uk\/guidance-regulation\/providers\/registration\/scope-registration\/regulated-activities\/diagnostic-and-screening-procedures\"\u003eCQC diagnostic and screening services guidance\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"vm_section vm_faq\"\u003e\n\u003cp class=\"vm_eyebrow\"\u003eSearch led questions\u003c\/p\u003e\n\u003ch3\u003eHome vitamin deficiency test FAQs\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I test for vitamin deficiency at home?\u003c\/summary\u003e\n\u003cp\u003eYes. This kit uses a capillary blood sample collected at home and returned for laboratory analysis. It measures selected vitamin, mineral and iron related biomarkers rather than every possible nutrient.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does a vitamin and mineral blood test check?\u003c\/summary\u003e\n\u003cp\u003eThis panel checks 25 hydroxyvitamin D, active vitamin B12, serum folate, magnesium, ferritin, serum iron, TIBC, UIBC and transferrin saturation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this test diagnose all vitamin deficiencies?\u003c\/summary\u003e\n\u003cp\u003eNo. It does not measure every vitamin or mineral and cannot identify every cause of tiredness, neurological symptoms, anaemia or malabsorption. The panel does not include a full blood count, calcium, zinc, copper or vitamin A.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is active vitamin B12?\u003c\/summary\u003e\n\u003cp\u003eActive B12, also called holotranscobalamin, measures the fraction of vitamin B12 available for cells to use. NICE accepts active B12 as an initial test when vitamin B12 deficiency is suspected.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat active B12 level suggests deficiency?\u003c\/summary\u003e\n\u003cp\u003eUsing NICE interpretation, an active B12 result below 25 pmol\/L is consistent with deficiency, 25 to 70 pmol\/L is indeterminate and above 70 pmol\/L makes deficiency less likely. The laboratory report takes priority.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between iron and ferritin?\u003c\/summary\u003e\n\u003cp\u003eSerum iron measures iron circulating at the time of collection and can vary through the day. Ferritin reflects stored iron, although inflammation, liver disease and other conditions can raise ferritin independently of iron stores.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat ferritin level indicates iron deficiency?\u003c\/summary\u003e\n\u003cp\u003eNICE guidance states that ferritin below 30 micrograms per litre confirms iron deficiency in adults. A higher ferritin does not always exclude deficiency where inflammation or chronic illness is present.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is transferrin saturation?\u003c\/summary\u003e\n\u003cp\u003eTransferrin saturation estimates the percentage of iron carrying sites on transferrin that are occupied. It is calculated from serum iron and total iron binding capacity and can help assess iron deficiency or possible iron overload.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat are TIBC and UIBC?\u003c\/summary\u003e\n\u003cp\u003eTIBC estimates the total amount of iron that blood proteins could bind. UIBC estimates the unused binding capacity. TIBC or UIBC may rise when iron stores are low and may be lower in inflammation, liver disease or iron overload.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan this blood test diagnose anaemia?\u003c\/summary\u003e\n\u003cp\u003eNo. Anaemia is diagnosed using haemoglobin and red blood cell measurements from a full blood count, which are not included. The iron, B12 and folate results can provide nutritional context but cannot diagnose anaemia alone.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is a normal vitamin D level in the UK?\u003c\/summary\u003e\n\u003cp\u003eCurrent UK laboratory guidance generally regards below 25 nmol\/L as deficient, 25 to 50 nmol\/L as potentially inadequate and above 50 nmol\/L as sufficient for most people. Use the interval and comment printed on your report.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan a magnesium blood test show magnesium deficiency?\u003c\/summary\u003e\n\u003cp\u003eSerum magnesium can identify clearly low or high circulating magnesium, but most magnesium is stored inside cells and bones. A normal serum result does not rule out every problem involving magnesium.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to fast for a vitamins and minerals blood test?\u003c\/summary\u003e\n\u003cp\u003eFasting is not always required, but serum iron can vary with meals and time of day. Follow the kit instructions. Where consistency is important, morning collection before food may be recommended.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I stop vitamins or iron supplements before testing?\u003c\/summary\u003e\n\u003cp\u003eDo not stop prescribed supplements without medical advice. Record all vitamins, iron, folic acid, magnesium and injections. Recent supplementation can affect results and may influence how they are interpreted.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan inflammation affect ferritin and iron results?\u003c\/summary\u003e\n\u003cp\u003eYes. Ferritin can rise during inflammation, while serum iron and transferrin can fall. A clinician may request CRP, a full blood count or repeat testing to interpret the pattern.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan high vitamin B12 be caused by supplements?\u003c\/summary\u003e\n\u003cp\u003eYes. Tablets, injections and fortified products commonly raise B12. An unexplained high result without supplementation can also occur with liver, kidney or blood conditions and should be discussed with a clinician.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen should abnormal vitamin or mineral symptoms be treated as urgent?\u003c\/summary\u003e\n\u003cp\u003eSeek prompt help for severe weakness, collapse, chest pain, severe breathlessness, confusion, seizures, new balance or walking problems, black stools, visible blood loss or severe persistent vomiting.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre the laboratories UKAS accredited and CQC registered?\u003c\/summary\u003e\n\u003cp\u003eSamples are processed through UKAS accredited laboratories within a CQC registered diagnostic pathway. Collection equipment is UKCA and CE marked and supported by an ISO 13485 quality management framework.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"vm_footer_note\"\u003e\n\u003ch3\u003eMedical guidance\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo not wait for a home test if symptoms feel urgent.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeek prompt medical help for severe weakness, chest pain, severe breathlessness, collapse, confusion, seizures, new numbness or tingling, new balance or walking problems, black stools, blood in the stool or urine, heavy bleeding, severe abdominal pain or persistent vomiting.\u003c\/p\u003e\n\u003cp\u003eThis product measures selected nutritional markers. It cannot diagnose anaemia, malabsorption, iron overload or the cause of symptoms without wider clinical assessment.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/article\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":54410459349331,"sku":"493-vitamins-minerals","price":149.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Vitamin_Deficiency_Test_Kit_UK_-_Vitamins_Minerals_Iron.png?v=1785150608"},{"product_id":"advanced-thyroid-hormones","title":"Home Advanced Thyroid Test Kit UK - Hormones \u0026 Antibodies","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cmeta content=\"width=device-width, initial-scale=1\" name=\"viewport\"\u003e\u003cmeta content=\"Order a home thyroid test kit in the UK, processed by UKAS accredited and CQC registered labs. Checks TSH, FT4, FT3, TPO and thyroglobulin antibodies.\" name=\"description\"\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  .th_product {\n    --th_ink: #2f2a28;\n    --th_muted: #6f625d;\n    --th_taupe: #786863;\n    --th_taupe_dark: #5e4c46;\n    --th_cream: #f5eee3;\n    --th_line: #ded2c5;\n    --th_white: #ffffff;\n    --th_green_bg: #e8f3e9;\n    --th_green_text: #345f3f;\n    --th_amber_bg: #fff1cf;\n    --th_amber_text: #7b5715;\n    --th_orange_bg: #f9e7d7;\n    --th_orange_text: #8a4d2d;\n    --th_red_bg: #f8dfdf;\n    --th_red_text: #8f3535;\n    --th_blue_bg: #e8eef4;\n    --th_blue_text: #405c72;\n    color: var(--th_ink);\n    font-family: inherit;\n    font-size: 16px;\n    line-height: 1.7;\n    margin: 0 auto;\n    max-width: 1120px;\n  }\n\n  .th_product * { box-sizing: border-box; }\n\n  .th_product h2,\n  .th_product h3,\n  .th_product h4 {\n    color: var(--th_ink);\n    line-height: 1.2;\n    margin-top: 0;\n  }\n\n  .th_product h2 {\n    font-family: Georgia, \"Times New Roman\", serif;\n    font-size: clamp(32px, 5vw, 54px);\n    font-weight: 500;\n    margin-bottom: 18px;\n  }\n\n  .th_product h3 {\n    font-family: Georgia, \"Times New Roman\", serif;\n    font-size: clamp(25px, 3vw, 34px);\n    font-weight: 500;\n    margin-bottom: 16px;\n  }\n\n  .th_product h4 { font-size: 18px; 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}\n\n  .th_faq details {\n    border-bottom: 1px solid var(--th_line);\n    padding: 14px 0;\n  }\n\n  .th_faq details:last-child { border-bottom: 0; }\n\n  .th_faq summary {\n    cursor: pointer;\n    font-weight: 700;\n  }\n\n  .th_faq details p { margin-top: 12px; }\n\n  .th_footer_note {\n    background: var(--th_taupe_dark);\n    border-radius: 16px;\n    color: #ffffff;\n    padding: 24px;\n  }\n\n  .th_footer_note h3,\n  .th_footer_note strong { color: #ffffff; }\n\n  @media (max-width: 900px) {\n    .th_grid,\n    .th_method_grid,\n    .th_trust_grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }\n\n    .th_steps,\n    .th_review_grid { grid-template-columns: 1fr; }\n\n    .th_review_meta { grid-template-columns: 1fr; }\n  }\n\n  @media (max-width: 540px) {\n    .th_grid,\n    .th_method_grid,\n    .th_trust_grid { grid-template-columns: 1fr; }\n\n    .th_product { font-size: 15px; }\n\n    .th_biomarker summary {\n      font-size: 16px;\n      padding: 16px;\n    }\n\n    .th_biomarker_body { padding: 18px 15px 21px; }\n\n    .th_review_avatar {\n      flex-basis: 78px !important;\n      height: 78px !important;\n      max-height: 78px !important;\n      max-width: 78px !important;\n      min-height: 78px !important;\n      min-width: 78px !important;\n      width: 78px !important;\n    }\n  }\n\u003c\/style\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003carticle class=\"th_product\"\u003e\n\u003csection class=\"th_hero\"\u003e\n\u003cp class=\"th_eyebrow\"\u003eAt home advanced thyroid blood test\u003c\/p\u003e\n\u003ch2\u003eHome Advanced Thyroid Test Kit UK | Hormones \u0026amp; Antibodies\u003c\/h2\u003e\n\u003cp class=\"th_lead\"\u003e\u003cstrong\u003eA 5 biomarker home thyroid test measuring TSH, free T4, free T3, TPO antibodies and thyroglobulin antibodies.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe panel combines thyroid hormone measurements with selected autoimmune thyroid markers. It can provide information about underactive or overactive thyroid patterns and whether thyroid autoimmunity may be contributing.\u003c\/p\u003e\n\u003cdiv class=\"th_grid\"\u003e\n\u003cdiv class=\"th_stat\"\u003e\n\u003cstrong\u003e5 biomarkers\u003c\/strong\u003e\u003cspan\u003eTSH, FT4, FT3, TPO antibodies and thyroglobulin antibodies\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_stat\"\u003e\n\u003cstrong\u003eHome collection\u003c\/strong\u003e\u003cspan\u003eCapillary blood collected into the supplied microtainer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_stat\"\u003e\n\u003cstrong\u003eUK laboratory pathway\u003c\/strong\u003e\u003cspan\u003eUKAS accredited and CQC registered laboratory processing\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_stat\"\u003e\n\u003cstrong\u003eProduct code\u003c\/strong\u003e\u003cspan\u003eC1BLP13700\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_notice\"\u003e\n\u003cstrong\u003eImportant limitation\u003c\/strong\u003e\n\u003cp\u003eThis test may identify a thyroid hormone pattern or thyroid antibodies, but it does not replace a clinical diagnosis. It does not include TSH receptor antibodies, ultrasound imaging, examination of a thyroid lump or testing for thyroid cancer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_warning\"\u003e\n\u003cstrong\u003eDo not stop thyroid medicine\u003c\/strong\u003e\n\u003cp\u003eContinue prescribed thyroid treatment unless the clinician responsible for your care advises otherwise. Tell the testing service exactly what you take and when the last dose was taken.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"th_section\"\u003e\n\u003cp class=\"th_eyebrow\"\u003eQuality and compliance\u003c\/p\u003e\n\u003ch3\u003eHome testing supported by UK clinical standards\u003c\/h3\u003e\n\u003cdiv class=\"th_trust_grid\"\u003e\n\u003cdiv class=\"th_trust_item\"\u003e\n\u003cstrong\u003eUKAS accredited laboratories\u003c\/strong\u003e \u003cspan\u003eMedical laboratory accreditation assesses quality, competence and diagnostic performance.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_trust_item\"\u003e\n\u003cstrong\u003eCQC registered services\u003c\/strong\u003e \u003cspan\u003eThe diagnostic pathway uses organisations registered with the Care Quality Commission.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_trust_item\"\u003e\n\u003cstrong\u003eCompliant collection equipment\u003c\/strong\u003e \u003cspan\u003eUKCA and CE marked equipment supported by an ISO 13485 quality management framework.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_trust_item\"\u003e\n\u003cstrong\u003eSecure results\u003c\/strong\u003e \u003cspan\u003eClear collection guidance, order updates, secure result delivery and escalation support where needed.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"th_section\"\u003e\n\u003ch3\u003eWhat this advanced thyroid test measures\u003c\/h3\u003e\n\u003cdiv class=\"th_table_wrap\"\u003e\n\u003ctable class=\"th_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eHealth area\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eBiomarkers\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat they may help show\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePituitary thyroid signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTSH\u003c\/td\u003e\n\u003ctd\u003eThe signal from the pituitary gland that regulates thyroid hormone production.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCirculating thyroid hormones\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFree T4 and free T3\u003c\/td\u003e\n\u003ctd\u003eThe unbound thyroid hormones available to tissues.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAutoimmune thyroid context\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTPO antibodies and thyroglobulin antibodies\u003c\/td\u003e\n\u003ctd\u003eEvidence that the immune system is producing antibodies associated with autoimmune thyroid disease.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"th_section\"\u003e\n\u003ch3\u003eWho may consider this test?\u003c\/h3\u003e\n\u003cp\u003eThis panel may be considered by adults who want to review selected thyroid markers in the context of:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePersistent tiredness or feeling unusually cold\u003c\/li\u003e\n\u003cli\u003eUnexplained weight change\u003c\/li\u003e\n\u003cli\u003ePalpitations, tremor, sweating or heat intolerance\u003c\/li\u003e\n\u003cli\u003eDry skin, hair changes or constipation\u003c\/li\u003e\n\u003cli\u003eIrregular or heavy periods\u003c\/li\u003e\n\u003cli\u003eA personal or family history of thyroid or autoimmune disease\u003c\/li\u003e\n\u003cli\u003eAn earlier abnormal TSH, free T4 or free T3 result\u003c\/li\u003e\n\u003cli\u003eThyroid treatment monitoring requested by a clinician\u003c\/li\u003e\n\u003cli\u003eClarifying whether an abnormal thyroid pattern may have an autoimmune cause\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese symptoms are not specific to thyroid disease. A normal panel does not exclude other medical causes.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"th_section\"\u003e\n\u003ch3\u003eHow thyroid result patterns are considered\u003c\/h3\u003e\n\u003cp\u003eThe individual reference intervals on the laboratory report take priority. The examples below are simplified patterns and not diagnoses.\u003c\/p\u003e\n\u003cdiv class=\"th_table_wrap\"\u003e\n\u003ctable class=\"th_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eCommon pattern\u003c\/th\u003e\n\u003cth scope=\"col\"\u003ePossible context\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eImportant qualification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh TSH with low FT4\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA pattern commonly seen with primary hypothyroidism.\u003c\/td\u003e\n\u003ctd\u003eMedicines, recent illness and clinical history still matter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh TSH with normal FT4\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay be described as subclinical hypothyroidism when persistent.\u003c\/td\u003e\n\u003ctd\u003eA repeat test and TPO antibodies may help guide assessment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLow TSH with high FT4 or FT3\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA pattern commonly seen with hyperthyroidism or excess thyroid hormone replacement.\u003c\/td\u003e\n\u003ctd\u003eFurther tests may include TSH receptor antibodies or imaging.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLow or normal TSH with low FT4\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCan occur with severe illness, medicines or less commonly pituitary or hypothalamic disease.\u003c\/td\u003e\n\u003ctd\u003eThis discordant pattern needs clinician review and should not be interpreted as normal.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePositive antibodies with normal hormones\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMay indicate thyroid autoimmunity without current hormone dysfunction.\u003c\/td\u003e\n\u003ctd\u003eAntibody positivity alone does not mean medicine is required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"th_section\"\u003e\n\u003ch3\u003eHow the home thyroid test kit works\u003c\/h3\u003e\n\u003cdiv class=\"th_steps\"\u003e\n\u003cdiv class=\"th_step\"\u003e\n\u003cspan class=\"th_step_number\"\u003e1\u003c\/span\u003e\n\u003ch4\u003ePrepare for collection\u003c\/h4\u003e\n\u003cp\u003eReview medicine, supplement, biotin and recent illness guidance before collecting the sample.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_step\"\u003e\n\u003cspan class=\"th_step_number\"\u003e2\u003c\/span\u003e\n\u003ch4\u003eCollect and return\u003c\/h4\u003e\n\u003cp\u003eCollect capillary blood into the microtainer and return it using the supplied packaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_step\"\u003e\n\u003cspan class=\"th_step_number\"\u003e3\u003c\/span\u003e\n\u003ch4\u003eReview the complete pattern\u003c\/h4\u003e\n\u003cp\u003eConsider all five markers together and seek medical advice for abnormal, critical or discordant results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"th_section\"\u003e\n\u003ch3\u003ePreparing for your thyroid blood test\u003c\/h3\u003e\n\u003cdiv class=\"th_table_wrap\"\u003e\n\u003ctable class=\"th_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003ePreparation\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThyroid medicine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDo not stop levothyroxine, liothyronine or antithyroid medicine unless the prescribing clinician advises you to do so.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDose timing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFollow the kit or clinician instructions about when to collect relative to the latest thyroid medicine dose.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBiotin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBiotin is vitamin B7. High intake can interfere with some thyroid assays. Ask whether and for how long it should be paused.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther medicines\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRecord amiodarone, lithium, steroids, anticonvulsants, iodine products and any hormone treatment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecent illness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAcute illness and recovery can alter thyroid results. Follow the recommendation to delay non urgent testing after a recent infection where applicable.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFasting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFasting is not normally required for this panel. Follow the specific kit instructions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePregnancy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePregnancy requires different interpretation and closer medical oversight. Tell your GP promptly if you are pregnant or planning pregnancy.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"th_section\"\u003e\n\u003ch3\u003eBiomarkers and result interpretation\u003c\/h3\u003e\n\u003cp\u003eSelect each marker to read what it measures, preparation guidance and how low, normal, high, positive or negative results may be considered.\u003c\/p\u003e\n\u003cdetails class=\"th_biomarker\"\u003e\n\u003csummary\u003eThyroid stimulating hormone\u003c\/summary\u003e\n\u003cdiv class=\"th_biomarker_body\"\u003e\n\u003cp\u003eThyroid stimulating hormone, known as TSH, is produced by the pituitary gland. It signals the thyroid to produce thyroid hormones.\u003c\/p\u003e\n\u003cp\u003eIn primary thyroid disease, a high TSH commonly accompanies an underactive thyroid, while a low TSH commonly accompanies an overactive thyroid. TSH must be interpreted with free T4, free T3, medicines and symptoms.\u003c\/p\u003e\n\u003cdiv class=\"th_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eDo not stop prescribed thyroid medicine. Tell the provider about levothyroxine, liothyronine, carbimazole, propylthiouracil, amiodarone, lithium, steroids, anticonvulsants, iodine and supplements. Biotin is vitamin B7 and can interfere with some thyroid assays. Follow clinical or laboratory advice about whether it should be paused.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"th_table_wrap\"\u003e\n\u003ctable class=\"th_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA profoundly suppressed result may occur with significant thyroid overactivity, excessive thyroid hormone replacement, recent treatment or less common pituitary or medical factors.\u003c\/td\u003e\n\u003ctd\u003eArrange prompt medical review and follow any urgent laboratory instruction.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA low result may occur with an overactive thyroid, thyroid hormone medicine, pregnancy, recent illness or some medicines.\u003c\/td\u003e\n\u003ctd\u003eDiscuss it with a GP, particularly when free T4 or free T3 is raised.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eInterpret it with free T4 and free T3. Seek medical advice if symptoms persist.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA high result may occur when the thyroid is underactive or the replacement dose is insufficient. Recovery from illness and some medicines can also affect TSH.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result with your GP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very high result may indicate marked thyroid underactivity, although pituitary causes are much less common than primary thyroid disease.\u003c\/td\u003e\n\u003ctd\u003eArrange prompt medical assessment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"th_biomarker\"\u003e\n\u003csummary\u003eFree thyroxine\u003c\/summary\u003e\n\u003cdiv class=\"th_biomarker_body\"\u003e\n\u003cp\u003eFree thyroxine, known as free T4 or FT4, measures the unbound portion of thyroxine available to tissues. Thyroxine is the principal hormone released by the thyroid.\u003c\/p\u003e\n\u003cp\u003eFT4 is interpreted with TSH. A low FT4 with high TSH commonly supports primary hypothyroidism, while a high FT4 with low TSH commonly supports hyperthyroidism or excess replacement.\u003c\/p\u003e\n\u003cdiv class=\"th_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eDo not stop prescribed thyroid medicine. Tell the provider about levothyroxine, liothyronine, carbimazole, propylthiouracil, amiodarone, lithium, steroids, anticonvulsants, iodine and supplements. Biotin is vitamin B7 and can interfere with some thyroid assays. Follow clinical or laboratory advice about whether it should be paused.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"th_table_wrap\"\u003e\n\u003ctable class=\"th_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA critically low result may occur with severe thyroid hormone deficiency, treatment effects or less common pituitary disease.\u003c\/td\u003e\n\u003ctd\u003eSeek urgent medical review, especially with extreme drowsiness, confusion, low temperature or severe weakness.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA low result may occur with an underactive thyroid, insufficient replacement, pituitary disease, severe illness or some medicines.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result with your GP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eInterpret it with TSH and symptoms.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA high result may occur with an overactive thyroid, excessive replacement, thyroiditis, pregnancy related changes or assay interference.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result with your GP promptly.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA critically high result may accompany severe thyrotoxicosis.\u003c\/td\u003e\n\u003ctd\u003eSeek urgent medical review, particularly with rapid heartbeat, fever, agitation, vomiting or confusion.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"th_biomarker\"\u003e\n\u003csummary\u003eFree triiodothyronine\u003c\/summary\u003e\n\u003cdiv class=\"th_biomarker_body\"\u003e\n\u003cp\u003eFree triiodothyronine, known as free T3 or FT3, measures the unbound portion of triiodothyronine available to tissues. T3 is the more biologically active thyroid hormone.\u003c\/p\u003e\n\u003cp\u003eFT3 is especially useful when TSH is low and an overactive thyroid is suspected. A low FT3 can occur during significant non thyroid illness and does not by itself diagnose hypothyroidism.\u003c\/p\u003e\n\u003cdiv class=\"th_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eDo not stop prescribed thyroid medicine. Tell the provider about levothyroxine, liothyronine, carbimazole, propylthiouracil, amiodarone, lithium, steroids, anticonvulsants, iodine and supplements. Biotin is vitamin B7 and can interfere with some thyroid assays. Follow clinical or laboratory advice about whether it should be paused.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"th_table_wrap\"\u003e\n\u003ctable class=\"th_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_critical\"\u003eCritical low\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA very low result can occur with severe illness, reduced thyroid hormone production, medicine effects or under replacement.\u003c\/td\u003e\n\u003ctd\u003eDiscuss urgently with a clinician when the result is critical or severe symptoms are present.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_low\"\u003eLow\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA low result may occur with an underactive thyroid, severe illness, calorie restriction or medicine effects.\u003c\/td\u003e\n\u003ctd\u003eInterpret with TSH and FT4 rather than in isolation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result falls within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eConsider it with TSH, FT4 and symptoms.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA high result may occur with an overactive thyroid, excessive liothyronine or thyroid hormone replacement, thyroiditis or assay interference.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result promptly with your GP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_critical\"\u003eCritical high\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA critically high result may accompany severe thyrotoxicosis.\u003c\/td\u003e\n\u003ctd\u003eSeek urgent medical review if accompanied by rapid heartbeat, fever, agitation, breathlessness, vomiting or confusion.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"th_biomarker\"\u003e\n\u003csummary\u003eThyroid peroxidase antibodies\u003c\/summary\u003e\n\u003cdiv class=\"th_biomarker_body\"\u003e\n\u003cp\u003eThyroid peroxidase antibodies, known as TPO antibodies or TPOAb, target an enzyme involved in thyroid hormone production.\u003c\/p\u003e\n\u003cp\u003eRaised TPO antibodies support an autoimmune cause when thyroid function is abnormal, particularly Hashimoto's thyroiditis. They can also be present in some people with normal thyroid hormone results and do not by themselves show current thyroid function.\u003c\/p\u003e\n\u003cdiv class=\"th_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eDo not stop prescribed thyroid medicine. Tell the provider about levothyroxine, liothyronine, carbimazole, propylthiouracil, amiodarone, lithium, steroids, anticonvulsants, iodine and supplements. Biotin is vitamin B7 and can interfere with some thyroid assays. Follow clinical or laboratory advice about whether it should be paused.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"th_table_wrap\"\u003e\n\u003ctable class=\"th_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_normal\"\u003eNegative\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eNo raised TPO antibody level was detected using the laboratory cut off.\u003c\/td\u003e\n\u003ctd\u003eThis reduces but does not eliminate the possibility of autoimmune thyroid disease.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result is within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eInterpret it with TSH, free T4, free T3 and symptoms.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_high\"\u003ePositive\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA positive result supports thyroid autoimmunity and is commonly found in Hashimoto's thyroiditis. It can sometimes occur with Graves' disease or in people whose thyroid function remains normal.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the complete thyroid profile with your GP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA raised result indicates thyroid autoantibodies but the number does not directly measure symptom severity or the degree of thyroid underactivity.\u003c\/td\u003e\n\u003ctd\u003eA medical review is appropriate, but a raised antibody result alone is not normally an emergency.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"th_biomarker\"\u003e\n\u003csummary\u003eThyroglobulin antibodies\u003c\/summary\u003e\n\u003cdiv class=\"th_biomarker_body\"\u003e\n\u003cp\u003eThyroglobulin antibodies, known as TgAb, target thyroglobulin, a protein produced within the thyroid and used in thyroid hormone production.\u003c\/p\u003e\n\u003cp\u003eRaised TgAb can occur in autoimmune thyroid disease, particularly Hashimoto's thyroiditis. The result is less specific than a complete clinical assessment and does not show whether thyroid hormone production is currently normal, low or high.\u003c\/p\u003e\n\u003cdiv class=\"th_subnote\"\u003e\n\u003cstrong\u003eBefore testing\u003c\/strong\u003e\n\u003cp\u003eDo not stop prescribed thyroid medicine. Tell the provider about levothyroxine, liothyronine, carbimazole, propylthiouracil, amiodarone, lithium, steroids, anticonvulsants, iodine and supplements. Biotin is vitamin B7 and can interfere with some thyroid assays. Follow clinical or laboratory advice about whether it should be paused.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to understand this result\u003c\/h4\u003e\n\u003cdiv class=\"th_table_wrap\"\u003e\n\u003ctable class=\"th_table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eResult\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat it may mean\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_normal\"\u003eNegative\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eNo raised thyroglobulin antibody level was detected using the laboratory cut off.\u003c\/td\u003e\n\u003ctd\u003eThis does not exclude every autoimmune or non autoimmune thyroid condition.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_normal\"\u003eNormal\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eThe result is within the laboratory reference interval.\u003c\/td\u003e\n\u003ctd\u003eInterpret it with TPO antibodies and the thyroid hormone profile.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_high\"\u003ePositive\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA positive result may support autoimmune thyroid activity, particularly when other thyroid tests or symptoms are abnormal.\u003c\/td\u003e\n\u003ctd\u003eDiscuss the result with your GP.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"th_status th_high\"\u003eHigh\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eA raised result indicates measurable thyroglobulin antibodies. The concentration does not by itself establish the severity of thyroid disease.\u003c\/td\u003e\n\u003ctd\u003eReview the full pattern with a clinician rather than treating the antibody result alone.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection id=\"content-standards\" class=\"th_section\"\u003e\n\u003cp class=\"th_eyebrow\"\u003eContent standards\u003c\/p\u003e\n\u003ch3\u003eHow this product information was prepared\u003c\/h3\u003e\n\u003cp\u003eThis page was prepared from the supplied five marker thyroid product specification and expanded using current UK thyroid, laboratory and medicine safety guidance.\u003c\/p\u003e\n\u003cdiv class=\"th_method_grid\"\u003e\n\u003cdiv class=\"th_method_item\"\u003e\n\u003cstrong\u003ePrimary product source\u003c\/strong\u003e \u003cspan\u003eThe supplied biomarkers, medicine guidance, interpretation categories and product code.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_method_item\"\u003e\n\u003cstrong\u003eUK clinical references\u003c\/strong\u003e \u003cspan\u003eNICE, NHS, MHRA and British Thyroid Foundation information used for testing pathways, antibodies and biotin safety.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_method_item\"\u003e\n\u003cstrong\u003eClinical boundaries\u003c\/strong\u003e \u003cspan\u003eThe page distinguishes thyroid hormone patterns and antibody results from a confirmed diagnosis.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_method_item\"\u003e\n\u003cstrong\u003eReview policy\u003c\/strong\u003e \u003cspan\u003eMedical and editorial review at least annually and earlier when the panel, laboratory pathway or UK guidance changes.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection id=\"medical-review\" class=\"th_section\"\u003e\n\u003cp class=\"th_eyebrow\"\u003eExpert review\u003c\/p\u003e\n\u003ch3\u003eMedical and editorial review\u003c\/h3\u003e\n\u003cp\u003eThis product information has been reviewed for general medical accuracy, thyroid hormone context, antibody limitations, medicine safety and appropriate escalation of abnormal results.\u003c\/p\u003e\n\u003cp\u003eThe review applies to general product information. It is not personal medical advice and does not replace assessment by a GP or endocrinologist.\u003c\/p\u003e\n\u003cdiv class=\"th_review_grid\"\u003e\n\u003carticle class=\"th_review_card\"\u003e\n\u003cdiv class=\"th_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"th_review_avatar th_review_avatar_snieguole\" aria-label=\"Portrait of Dr Snieguole Geige\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"th_review_label\"\u003eMedical review\u003c\/span\u003e\n\u003ch4 class=\"th_review_name\"\u003eDr Snieguole Geige\u003c\/h4\u003e\n\u003cp class=\"th_review_title\"\u003eDentist, Medical Doctor and Senior Adviser\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"th_review_scope\"\u003eReviewed the general thyroid health boundaries, autoimmune context, patient communication and guidance on when direct medical assessment is required.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/dr-snieguole-geige-dentist-medical-doctor-and-senior-adviser\" class=\"th_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003carticle class=\"th_review_card\"\u003e\n\u003cdiv class=\"th_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"th_review_avatar th_review_avatar_rimas\" aria-label=\"Portrait of Dr Rimas Geiga\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"th_review_label\"\u003eMedical review\u003c\/span\u003e\n\u003ch4 class=\"th_review_name\"\u003eDr Rimas Geiga\u003c\/h4\u003e\n\u003cp class=\"th_review_title\"\u003eMedical Doctor, Nutritional Sciences Adviser and Healthy Ageing Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"th_review_scope\"\u003eReviewed the metabolism, energy, supplement and medicine context, including responsible discussion of biotin and iodine products.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/dr-rimas-geiga-medical-doctor-nutritional-sciences-adviser-and-healthy-ageing-expert\" class=\"th_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003carticle class=\"th_review_card\"\u003e\n\u003cdiv class=\"th_review_card_top\"\u003e\n\u003cdiv role=\"img\" class=\"th_review_avatar th_review_avatar_veronika\" aria-label=\"Portrait of Veronika Matutyte\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"th_review_label\"\u003eClinical and safety review\u003c\/span\u003e\n\u003ch4 class=\"th_review_name\"\u003eVeronika Matutyte\u003c\/h4\u003e\n\u003cp class=\"th_review_title\"\u003eMedical Doctor and Healthcare Management Expert\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"th_review_scope\"\u003eReviewed critical result guidance, medicine cautions, urgent symptoms, clinical limitations and the safety of the home testing pathway.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/veronika-matutyte-medical-doctor-and-healthcare-management-expert\" class=\"th_review_link\"\u003eView professional profile\u003c\/a\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"th_review_meta\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eLast medically reviewed\u003c\/strong\u003e \u003cspan\u003e26 July 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eReview cycle\u003c\/strong\u003e \u003cspan\u003eAt least once each year\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEarlier review\u003c\/strong\u003e \u003cspan\u003eWhen laboratory methods, medicine safety advice, biomarkers or thyroid guidance changes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"th_board_link\"\u003e\u003ca href=\"https:\/\/ht10f0-c0.myshopify.com\/pages\/medical-advisory-board\"\u003eMeet the Grace Belgravia Medical Advisory Board\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"th_section th_sources\"\u003e\n\u003cp class=\"th_eyebrow\"\u003eFurther reading\u003c\/p\u003e\n\u003ch3\u003eAuthoritative UK thyroid and laboratory information\u003c\/h3\u003e\n\u003cp\u003eThese resources provide additional context. They do not replace the instructions, reference intervals or comments supplied with your individual laboratory report.\u003c\/p\u003e\n\u003cdetails\u003e\n\u003csummary\u003eView NICE, NHS, MHRA and thyroid references\u003c\/summary\u003e\n\u003cdiv class=\"th_sources_body\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nice.org.uk\/guidance\/ng145\/chapter\/recommendations\"\u003eNICE thyroid disease assessment and management\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nhs.uk\/conditions\/underactive-thyroid-hypothyroidism\/\"\u003eNHS information about underactive thyroid\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.nhs.uk\/conditions\/overactive-thyroid-hyperthyroidism\/\"\u003eNHS information about overactive thyroid\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.btf-thyroid.org\/thyroid-function-testing\"\u003eBritish Thyroid Foundation thyroid function testing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.btf-thyroid.org\/thyroid-antibodies-explained\"\u003eBritish Thyroid Foundation thyroid antibodies information\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.gov.uk\/drug-device-alerts\/mhra-safety-roundup-may-2025\"\u003eMHRA information about biotin interference\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.ukas.com\/accreditation\/standards\/medical-laboratory-accreditation\/\"\u003eUKAS medical laboratory accreditation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.cqc.org.uk\/guidance-regulation\/providers\/registration\/scope-registration\/regulated-activities\/diagnostic-and-screening-procedures\"\u003eCQC diagnostic and screening services guidance\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"th_section th_faq\"\u003e\n\u003cp class=\"th_eyebrow\"\u003eSearch led questions\u003c\/p\u003e\n\u003ch3\u003eHome thyroid test kit FAQs\u003c\/h3\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I test my thyroid at home?\u003c\/summary\u003e\n\u003cp\u003eYes. This kit uses a capillary blood sample collected at home and returned for laboratory analysis. It measures thyroid hormones and two thyroid antibody markers.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does an advanced thyroid blood test check?\u003c\/summary\u003e\n\u003cp\u003eThis panel checks TSH, free T4, free T3, thyroid peroxidase antibodies and thyroglobulin antibodies. It combines thyroid function markers with selected autoimmune thyroid markers.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between a basic and advanced thyroid test?\u003c\/summary\u003e\n\u003cp\u003eA basic thyroid panel commonly measures TSH and free T4, sometimes with free T3. This advanced panel also measures TPO antibodies and thyroglobulin antibodies.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to fast for a thyroid blood test?\u003c\/summary\u003e\n\u003cp\u003eFasting is not usually required for these five markers. Follow the kit instructions and tell the provider about prescribed medicines, vitamins and supplements.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I take levothyroxine before a thyroid blood test?\u003c\/summary\u003e\n\u003cp\u003eDo not stop prescribed thyroid medicine. The timing of a dose can affect free hormone results, so follow the collection instructions or advice from the clinician monitoring your treatment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan biotin affect thyroid blood test results?\u003c\/summary\u003e\n\u003cp\u003eYes. High biotin intake can cause falsely high or low thyroid results in some laboratory methods. Biotin is vitamin B7, not vitamin B9. Ask a clinician or the testing service whether and for how long it should be paused.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat do positive TPO antibodies mean?\u003c\/summary\u003e\n\u003cp\u003eRaised TPO antibodies can support an autoimmune cause of thyroid dysfunction, particularly Hashimoto's thyroiditis. They can also occur in some people whose TSH and free T4 remain within range.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat do thyroglobulin antibodies mean?\u003c\/summary\u003e\n\u003cp\u003eThyroglobulin antibodies may occur in autoimmune thyroid disease, including Hashimoto's thyroiditis. They need to be considered with TPO antibodies, TSH, free T4, free T3 and symptoms.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan thyroid antibodies diagnose Hashimoto's disease?\u003c\/summary\u003e\n\u003cp\u003ePositive antibodies can support an autoimmune explanation, but diagnosis depends on the full thyroid pattern and clinical context. Antibodies alone do not show whether the thyroid is currently underactive.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this test check for Graves' disease?\u003c\/summary\u003e\n\u003cp\u003eThe panel can identify hormone patterns consistent with an overactive thyroid, and TPO or thyroglobulin antibodies may sometimes be raised. It does not include TSH receptor antibodies, the antibody test more specifically used when Graves' disease is suspected.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I have thyroid symptoms with a normal TSH?\u003c\/summary\u003e\n\u003cp\u003eYes. Symptoms such as tiredness, weight change and hair changes are not specific to thyroid disease. A normal result does not exclude every medical cause, and unusual free hormone patterns may still require clinical review.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan illness affect thyroid blood tests?\u003c\/summary\u003e\n\u003cp\u003eYes. Acute illness and recovery can temporarily alter thyroid hormone patterns. Follow the kit advice about delaying non urgent testing after a recent infection or illness.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat thyroid result patterns may need medical review?\u003c\/summary\u003e\n\u003cp\u003eHigh TSH with low free T4 may suggest an underactive thyroid, while low TSH with high free T4 or free T3 may suggest an overactive thyroid. Discordant or critical results require professional interpretation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen are thyroid symptoms urgent?\u003c\/summary\u003e\n\u003cp\u003eSeek urgent help for severe breathlessness, chest pain, collapse, marked confusion, very rapid or irregular heartbeat, extreme drowsiness, high fever with agitation or other severe symptoms.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre the laboratories UKAS accredited and CQC registered?\u003c\/summary\u003e\n\u003cp\u003eSamples are processed through UKAS accredited laboratories within a CQC registered diagnostic pathway. Collection equipment is UKCA and CE marked and supported by an ISO 13485 quality management framework.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection class=\"th_footer_note\"\u003e\n\u003ch3\u003eMedical guidance\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo not wait for a home test if you feel seriously unwell.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeek urgent medical advice for severe breathlessness, chest pain, collapse, marked confusion, a very rapid or irregular heartbeat, extreme drowsiness, high fever with agitation or other severe symptoms.\u003c\/p\u003e\n\u003cp\u003eSpeak with a GP promptly for unexplained weight loss, persistent palpitations, a neck swelling, difficulty swallowing, eye changes, pregnancy with thyroid symptoms or a critical laboratory result.\u003c\/p\u003e\n\u003cp\u003eThis product measures selected thyroid markers. It is not a substitute for a medical consultation, physical examination, diagnosis or treatment.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/article\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":54410475864403,"sku":"495-advanced-thyroid-hor","price":109.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/files\/Home_Advanced_Thyroid_Test_Kit_UK_-_Hormones_Antibodies.png?v=1785150104"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/7918\/4211\/collections\/Hair_Skin_Nails_Blood_Test_Home_Kits_UK.png?v=1785229737","url":"https:\/\/gracebelgravia.com\/collections\/hair-skin-nails-blood-test-home-kits-uk.oembed","provider":"Grace Belgravia","version":"1.0","type":"link"}