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Total T3
Specialistalso triiodothyronine
What it isThe combined measurement of T3 that is bound to transport proteins plus the small free fraction.
DoesReports the full T3 pool, but is less clinically informative than Free T3.
GoodA mid-range total T3 with normal Free T3 suggests adequate tissue thyroid hormone availability.
BadSame transport protein distortions as Total T4 apply.
- Standard
- 80–200 ng/dL.
- Optimal
- 130–180 ng/dL (narrow target)
- Modifiers
- Same as Total T4.
How to optimize
- Lifestyle
- Same as Free T3.
- Diet
- Same as Free T3.
- Supplements
- Same as Free T3.
- Peptides
- —
- Drugs
- Liothyronine (T3).
Reference ranges are general adult lab norms; optimal ranges are editorial picks from the longevity literature — not medical advice. Always interpret results with your physician.
within Thyroid