Triiodothyronine Total (T3) - Serum

Triiodothyronine Total (T3) - Serum

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This test is used to help evaluate thyroid function and diagnose thyroid diseases, including hyperthyroidism and hypothyroidism

This Test Includes

Tri Iodothyronine - T3

Test Instructions

Total parameters available: 1

Parameter Names:

  • Triiodothyronine Total (T3) - Serum

Test Instructions/Precautions:

  • Alcohol: Please abstain from alcohol before the test
  • Medication :Any pre-existing medication should only be stopped after consultation with the referring Physician


Soft Copy (Portal/Email) : If the sample is collected before 12 noon then the report will get delivered as per Reporting Time / Maximum TAT (Turn Around Time) indicated with the test. For samples collected after 12 Noon, 12 hours may be added to the Report Turn Around TimeHard Copy : Delivered at home upon request. A small convenience fee may apply.

Why it is Done

Total Triiodothyronine is conducted to check for thyroid dysfunction. It helps in diagnosing hyperthyroidism, a condition wherein the thyroid overproduces hormones.

What is this test

Triiodothyronine (T3) is one of the hormones produced by the thyroid gland. This test is conducted to evaluate thyroid functioning and measures the blood level of the hormone T3. The Total T3 test measures both the bound and free forms of T3 in the blood. T3 exists in two forms - the more abundant form, which is attached to proteins that facilitates transportation of the hormone through the body and the less abundant form called T3 which circulates unattached.