Triiodothyronine - Wikipedia Triiodothyronine, also known as T3, is a thyroid hormone It affects almost every physiological process in the body, including growth and development, metabolism, body temperature, and heart rate
Triiodothyronine (T3) Tests: MedlinePlus Medical Test What is a triiodothyronine (T3) test? A triiodothyronine (T3) test measures the level of T3 in a sample of your blood It's used to help diagnose thyroid disease Your thyroid is a small, butterfly-shaped gland at the base of your throat It makes two hormones, T3 and T4 (thyroxine)
T3 (Triiodothyronine), Total, Serum - Mayo Clinic Laboratories . . . The 2 main hormones secreted by the thyroid gland are thyroxine (T4), which contains 4 atoms of iodine, and triiodothyronine (T3) T3 production in the thyroid gland constitutes approximately 20% of the total T3; the rest is generated by the conversion (deiodination) of T4 to T3