Subclinical hypothyroidism usually has no absolute food contraindications, but it is necessary to control the amount of food and the way of intake, if the hypothyroidism is caused by iodine excess, it is also necessary to limit the intake of iodine, and it is recommended to consult a doctor. Subclinical hypothyroidism often has no obvious symptoms or signs, may show symptoms of hypothyroidism, such as fatigue, fear of cold, dry skin, lack of energy, etc. Laboratory tests may only have elevated serum TSH levels, FT3 and FT4 levels are normal. Subclinical hypothyroidism does not have any food that can’t be eaten, but it is necessary to limit the amount of food and the way of intake, such as cabbage should be cooked and eaten, and avoid dipping sauce. For some high-fat, high-cholesterol foods need to be eaten in small quantities, such as cakes, animal offal, crab roe and so on. In addition, if the patient’s subclinical hypothyroidism is caused by iodine overdose, he or she should avoid consuming iodine-containing foods and medicines, such as seaweed, marine fish, and cidiaride. Patients with subclinical hypothyroidism are advised to go to the hospital regularly for thyroid function tests, and consult the doctor promptly if there is any discomfort.