Thyroid hormones control metabolism, growth, body temperature, muscle strength, appetite, and the health of your heart, brain, kidneys, and reproductive system. Thyroid cells are the only cells in the body that absorb iodine. The thyroid uses iodine to create the T4 (thyroxine) and T3 (triiodothyronine) hormones. read more
If T3 and T4 levels are high, the pituitary gland releases less TSH to the thyroid gland to slow production of these hormones. Why You Need a Thyroid Gland T3 and T4 travel in your bloodstream to reach almost every cell in the body. The hormones regulate the speed with which the cells/metabolism work. read more
The thyroid gland produces hormones that regulate the body's metabolic rate as well as heart and digestive function, muscle control, brain development, mood and bone maintenance. Its correct functioning depends on having a good supply of iodine from the diet. read more