1, limit fat intake: fat is the body supply of calories and help fat-soluble vitamins absorption substances. In hypothyroidism, plasma cholesterol is excreted slowly, so the concentration of plasma cholesterol is high. The intake of fat should be limited to reduce the concentration of plasma cholesterol. 2.Iodized salt supplementation: To prevent and control goiter, so that the incidence of hypothyroidism is significantly reduced. This method is suitable for endemic goiter endemic areas. Supplemental iodized salt can be taken from iodized salt, but also from iodized soy sauce and iodized bread, as well as iodine-rich kelp and nori. Avoid cabbage, cabbage, rape, cassava, walnuts and other foods that may cause goiter. 3, supply enough protein: should eat more eggs, dairy, meat, fish, etc., and pay attention to the complementarity of plant and animal proteins.