Hormone — Thyroid Axis

TSH (Thyroid Stimulating Hormone)

TSH is the pituitary signal that drives thyroid hormone production.

Reference range

Reference ranges vary by lab, age and sex. Your own lab report carries the authoritative range, and your clinician reads it with you.

Why it matters

TSH is the screening marker for thyroid axis function. Subclinical thyroid dysfunction is common and strongly affects metabolism, energy, and mood. REVRCEL reads TSH with free T3 and free T4 rather than alone, because TSH-only screening can miss the actionable cases.

How REVRCEL clinicians read it

Pair with free T3 and free T4. TSH-only is not a complete thyroid workup.

Included in

Common questions

Is TSH alone enough to screen the thyroid?

No. Pair with free T3 and free T4 to catch cases TSH-only misses.

Related biomarkers

Free T3Free T4

Statements have not been evaluated by the FDA. This page is educational and is not medical advice.

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