Each grain of thyroid contains liothyronine (T3) 9mcg and levothyroxine (T4) 38mcg. The mechanisms by which thyroid hormones exert their physiologic action are not well understood. These hormones ...

Years ago, I switched from Synthroid to Armour Thyroid. How does Armour compare to levothyroxine with regard to osteoporosis? ANSWER: Physicians have known for decades that too much thyroid ...