For patients with primary hyperthyroidism or hypothyroidism due to Hashimoto’s thyroiditis, the main foods that should not be eaten are foods with high iodine content, including kelp, nori, iodized salt, seafood, etc., because increased iodine intake will, on the one hand, aggravate the original symptoms of hyperthyroidism, and on the other hand, there are many studies in China that have found that for patients with hypothyroidism due to Hashimoto’s thyroiditis, increased iodine intake will also lead to a further increase in antibody levels, which will aggravate antibody damage to the follicular cells of the thyroid gland. On the other hand, many studies in China have found that in patients with hypothyroidism due to Hashimoto’s thyroiditis, increased iodine intake can lead to further increase in antibody levels, which can aggravate antibody damage to thyroid follicular cells. Therefore, these two types of patients should have a low iodine diet, while all other foods can be eaten normally. Patients with iodine-deficient goiter are different. They need to eat foods with high iodine content to replenish iodine and gradually restore the enlarged thyroid to normal. Therefore, the dietary requirements of patients with different types of thyroid disorders are different.