what iodine is good for
Why iodine is good for you. Iodine is required to make the thyroid hormones that regulate metabolism. While iodine's only function is to make thyroid hormones, it still has a very important role in the body. The thyroid hormones play a big role in growth, cell reproduction, nerve functions and how cells use oxygen. One of the thyroid hormones-thyroxin-regulates how fast energy is used from food.