Thyroid articles
Thyroid
Thyroid antibodies: when TPO and TgAb are added
The "why" test behind TSH and T4 - when antibodies are added, what positive-with-normal-function means, and why tracking them adds nothing.
Clinician-reviewed·3 min read
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Thyroid
Biomarker 101: Thyroid-stimulating hormone (TSH)
TSH is the pituitary’s instruction to the thyroid, which is why a high reading points to an underactive gland.
Clinician-reviewed·3 min read
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Thyroid
Biomarker 101: T4 (thyroxine)
T4 is the thyroid’s main output, and mostly inactive until the body converts it. Why free T4 tells you more than total T4.
Clinician-reviewed·3 min read
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Thyroid
Biomarker 101: T3 (triiodothyronine)
T3 is the active thyroid hormone, and around 80 per cent of it is converted from T4 rather than made by the thyroid.
Clinician-reviewed·3 min read
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