Free T4 (Thyroxine) Test
Blood
Thyroid
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Conditions Free T4 (Thyroxine) Test Can Detect
Free T4 testing helps diagnose:
- Hypothyroidism, shown by a low Free T4
- Hyperthyroidism, shown by a high Free T4
- Central (pituitary-related) thyroid disorders, which can show a low Free T4 with an unexpectedly normal or low TSH
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Quick Facts
CategoryThyroid
Specimen TypeBlood
Organ System—
Available At0 labs
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