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