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Thyroid

TSH

The pituitary signal telling your thyroid to work harder.

Unit mIU/LTypical adult range 0.4–4 mIU/L
What it is

The pituitary signal telling your thyroid to work harder.

Why it matters

It moves before the thyroid hormones do and in the opposite direction, which makes it the most sensitive early marker of thyroid trouble.

Reading the number

A high TSH suggests an underactive thyroid and a low one an overactive gland. It varies through the day and peaks in the early hours.

What moves it
time of daybiotin supplementsacute illnesspregnancysome medications
Read alongside
Free T4Free T3Anti-TPO antibodiesTSH-receptor antibodies (TRAb)Anti-thyroglobulin antibodiesIGF-1Basal metabolic rateResting heart rate
When to raise it

Worth discussing a value outside the range that repeats, especially with fatigue or weight change.

Tracking only, not a diagnosis. The range above is a typical adult reference range — the range printed by the lab that ran your test is the one that applies to you. Discuss anything that concerns you with your doctor.

Also known as

On a report in another language.

A lab report names this analyte in its own language. Vitals Vault recognises each of these and files them all under TSH.

TirotropinaTüreotropiinThyreotropinHormona Estimulante da TiroideTireoestimulinaTireoestimulina (TSH)

Track your tsh over time.

TSH is one of 165 analytes Vitals Vault charts over time. Import a lab report in any language and this number lands on a timeline only you can read.

Continue with Google
Tracking only. This app is not medical advice. Always discuss results and future analysis with your doctor.

Catalog entry last updated 2026-08-27. Browse all 165 metrics.