Thyroid hormone-intracorporal process o easy to absorb using po and the oral absorption rate of T3 and Ta are 50%w 75% and 75%w 90% respectively oThe rate of plasma protein combining is 99%, and the protein binding of T3 is less than the T4, the role of t3 is more potent than Ta with a half-life for 2 days, T4 is slow and weak with a half-life for 5 daysThyroid hormone—intracorporal process Easy to absorb using Po and the oral absorption rate of T3 and T4 are 50% ~ 75% and 75% ~ 90% respectively. The rate of plasma protein combining is 99%, and the protein binding of T3 is less than the T4 , the role of T3 is more potent than T4 with a half-life for 2 days, T4 is slow and weak with a half-life for 5 days