High cortisol is killing your thyroid (reverse t3 explained)

本站添加: 2026-05-22

When cortisol remains elevated due to chronic stress, under-eating, overtraining, poor sleep, or low blood sugar, the body converts more thyroid hormone into reverse T3 instead of active T3; reverse T3 acts as a brake on metabolism, slowing energy production to help the body conserve resources during stress, which means lowering cortisol can naturally reduce reverse T3 levels.