Thyroid Stimulating Hormone NOT a thyroid hormone
Active, usable hormone. Commonly known as "The Gas" hormone in the process. Free T4
The inactive form of T4. Free T4 is available to the body to convert to Free T3.
Anti-thyroid hormone. The "Brakes". When T4 does not properly convert to T3. <15 if T3 is optimal otherwise <12 LAB TEST
(dependent on RT3 values and medication)
(or in the upper quadrant of the range)