Thyroid diseases include hypothyroidism, hyperthyroidism, thyroid cancer, etc. How to eat breakfast is related to specific diseases, as follows: 1. Hypothyroidism: hypothyroid patients need to take long-term levothyroxine sodium tablets as a replacement therapy, and should avoid long-term consumption of large quantities of goiter-causing foods, such as cabbage, kale, cassava and so on. If hypothyroidism is caused by iodine overdose, iodine intake needs to be restricted. 2. Hyperthyroidism: hyperthyroidism is caused by the thyroid gland secreting too much thyroxine, and iodine is the raw material for synthesizing thyroxine, so hyperthyroidism should pay attention to a low iodine diet, it is advisable to consume non-iodized salt, and it is not recommended that you eat kelp, marine fish, seaweed, and so on. Normally, high-calorie, high-vitamin, high-protein and mineral-rich diet is the main focus. For example, you can eat noodles, milk, eggs and steamed bread for breakfast. Thyroid disease patients, it is recommended to rationalize the diet under the guidance of the doctor.