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HomeHealth QueryTHYROID PROFILE TOTAL (T3, T4, TSH)Is free T3 or free T4 a better index of thyroid fu...
  • Female
  • 45 Years
  • 21/06/2023

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

Doctor 1

Answered by 1 Apollo Doctors

Dr. Dr Shaik Kalam

Dr Shaik Kalam

General Practitioner

  • MD (Physician)
  • 3+ Yrs
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T4. This is because T4 is converted into another thyroid hormone called T3 (triiodothyronine), free T4 is the more important hormone to measure.

Dr. Shaik Suggests...

Take a Beta-2- Glycoprotein -1 IgG Test or Take a Zinc - Urine Random Test

Book Beta-2- Glycoprotein -1 IgG TestBook Zinc - Urine Random Test

Answered 24/07/2025

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Disclaimer: Answers on Apollo 247 are not intended to replace your doctor advice. Always seek help of a professional doctor in case of an medical emergency or ailment.