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
Free T4 is the thyroid axis's storage form. Its level, alongside TSH and free T3, completes a real thyroid workup. Reading all three reveals whether the issue is pituitary signaling, gland output, or peripheral conversion.
How REVRCEL clinicians read it
Always paired with TSH and free T3.
Included in
- Hormone Optimization Panel
Related biomarkers
Statements have not been evaluated by the FDA. This page is educational and is not medical advice.
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Apply code PEPTIDE50 at checkout for half off the first month of an eligible peptide or weight-loss protocol. Treatment begins only if a licensed clinician in your state approves it after reviewing your intake.
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