Reverse T3- checks for Reverse T3 levels in your blood’s serum. It’s used to identify stress on the body due to many factors including extreme dieting, surgery, liver and kidney disease, insulin-dependent diabetes, serious injury, and chronic alcohol consumption.
Reverse T3 is a derivative of Thyroxine T4. T4 becomes the active thyroid hormone Triiodothyronine T3 when it loses one of its iodine atoms. T4 is also converted by the body into Reverse T3, which is an inactive version of T3 that lacks T3’s metabolic function. Reverse T3 is thought to be produced by the body to conserve energy during times of severe illness and stress.