 With the thyroid gland, you have to look at iodine levels. Iodine is the number one trace mineral that causes the thyroid to work well. And if we get deficient in iodine, a lot of times the thyroid won't work. And Broda Barnes wrote an interesting book on the thyroid. He's a famous endocrinologist. You might want to look that up on Amazon. But just look up Broda Barnes. And I would look up and do some of the reading on