Biomarker education
TSH
Also called: Thyroid-stimulating hormone
TSH is a pituitary hormone measured when clinicians evaluate thyroid-related lab context.
General biomarker education — not personalized medical advice. Learn more
What it generally measures
TSH helps regulate thyroid hormone production. Labs report a blood concentration; related thyroid hormones may appear on the same or separate reports.
Common units on reports: mIU/L
Why people track it over time
People with serial thyroid labs often compare TSH over time. Timing of medications and lab methods can affect interpretation — ask your clinician.
Changes over time do not by themselves establish a diagnosis. Learn more
Questions you might ask a healthcare professional
- Ask whether free T4 or other thyroid tests on the report should be reviewed together.
- Confirm medication timing instructions before drawing conclusions from a single value.
- Compare against the reference range on your source report.
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