If you have hypothyroidism, you have an underactive thyroid gland. The thyroid is not able to make enough thyroid hormone for normal bodily function. Even though the thyroid is a small butterfly-shaped gland in the base of the neck, it affects your energy, metabolism, temperature regulation, and even your brain and heart.
There is no evidence that eating or avoiding certain foods can improve thyroid function or reverse hypothyroidism, however your diet can make your symptoms worse or even interfere with your medications.
You need adequate amounts of iodine in your diet for normal thyroid function. In the developed world, we get enough iodine in iodized salt, seafood, and dairy products. Therefore, if you have a healthy, balanced diet, there is no need to take additional iodine supplements. In fact, too much iodine can lead to hyperthyroidism or hypothyroidism in some cases.
There is also a concern that isoflavones, found in soy can cause hypothyroidism but research has shown this to only be