Youtube Account: Dr Paul Mason

T3 and T4: What These Thyroid Hormones Mean

T4 and T3 thyroid hormones differ by their iodine count, but there is a catch. T4 is a prohormone, naturally inactive until your body strips away an iodine atom. Only then does it transform into T3, the highly active form that drives metabolism. The Dr Paul Mason Show - episode 6 🔗 Watch the full video: https://youtu.be/qY2oKGzLYYc #Thyroid #Hashimotos #BiologyFacts #HumanPhysiology