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endocrinology
Free Triiodothyronine
Free T3· also: Free T3, fT3
Clinical Overview
Free T3 is the most biologically active thyroid hormone. It is useful in diagnosing T3 toxicosis and monitoring thyroid replacement therapy.
Reference RangesWHO/IFCC standards
| Age Group | Reference Range | Unit | Notes |
|---|---|---|---|
| Adults (18–64) | 2.3 – 4.2 | pg/mL | — |
Also reported in: pmol/L.
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Related Topics
thyroidT3TFT