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Is free T3 or free T4 a better index of thyroid function?

Is free T3 or free T4 a better index of thyroid function?

T4. This is because T4 is converted into another thyroid hormone called T3 (triiodothyronine), free T4 is the more important hormone to measure.

Last updated on 21 Jun 2023

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Thyroid Profile (Total T3, Total T4, TSH)

Thyroid Profile Total, Thyroid Stimulating Hormone Total T3 Total T4, Serum Thyroid Profile

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