The thyroid gland is the gland responsible for producing hormones that regulate metabolism, body temperature and many other bodily functions. Thyroid problems, such as hypothyroidism, hyperthyroidism or Hashimoto's disease, can affect mood, weight and overall health. The right diet can help regulate the thyroid gland and support its function. In this article, we will discuss which nutrients are key to thyroid health and which foods to eat and which to avoid.