Posts Tagged "Triiodothyronin"

Thyroid Testing

Thyroid Testing

Before discussing the tests, we need to cover a few definitions:  T3 (triiodothyronine) – this is the active thyroid hormone.  rT3 (reverse T3) – an inactive form of T3 that blocks active T3 from reaching its receptors  T4 (thyroxine) –…