Service Description

The Free T3 test measures the level of triiodothyronine (T3) in the blood, the active thyroid hormone that regulates metabolism, energy, and overall thyroid function. Why it’s done: To evaluate thyroid function and hormone balance To help diagnose hyperthyroidism or hypothyroidism To monitor thyroid medication or therapy To investigate symptoms such as fatigue, weight changes, or temperature sensitivity Specimen Type: Blood draw Turnaround Time: Typically 1–3 business days Collection Available: In-office or mobile blood draw services