{"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. 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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","url":"https:\/\/gracebelgravia.com\/products\/advanced-thyroid-hormones","provider":"Grace Belgravia","version":"1.0","type":"link"}