FT3 – TRIIODOTHYRONINE FREE
01 Overview
02 Details
Why Get Tested?
To help evaluate thyroid gland function; to diagnose thyroid disease, including hyperthyroidism, and determine the cause; to monitor effectiveness of treatment of a thyroid disorder.
When to Get Tested?
When you have an abnormal TSH, particularly with a normal free T4 result, and/or signs and symptoms of hyperthyroidism.
Sample Required?
A blood sample taken from a vein in your arm.
Test Preparation Needed?
None needed; however, certain medications can interfere with the free T3 and total T3 tests, so tell your health practitioner about any drugs that you are taking.