Thyroid Profile (T3, T4, TSH) Test
Blood
Thyroid
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Thyroid Profile (T3, T4, TSH) Test Normal Reference Ranges
Reference ranges vary slightly between labs depending on the specific assay method used.
| Parameter | Normal Range |
|---|---|
| TSH | 0.4–4.0 mIU/L |
| Free T3 | 2.3–4.2 pg/mL |
| Free T4 | 0.8–1.8 ng/dL |
A high TSH with low T3/T4 typically indicates hypothyroidism, while a low TSH with high T3/T4 usually points to hyperthyroidism — your doctor will interpret the three values together rather than any single number alone.
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Quick Facts
CategoryThyroid
Specimen TypeBlood
Organ SystemThyroid & Endocrine Glands
Available At0 labs
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