1.What diseases need low iodine diet? In clinical practice, patients with thyroid diseases such as toxic diffuse goiter (hyperthyroidism), Hashimoto’s thyroiditis, thyroid nodules or thyroid cancer often need a “low iodine diet”. 2.How much iodine does a normal person need to consume daily? The minimum physiological requirement of iodine for normal adults is 75μg/d. According to the World Health Organization, the United Nations Children’s Fund (UNICEF), the International Council for the Control of Iodine Deficiency Disorders (ICCIDD) and other international organizations, it is appropriate to consume an average of 150μg of iodine per day for normal adults (including children and adolescents over 12 years of age), 90μg for infants, toddlers, and preschoolers, and 120μg for school-age children under 12 years of age (including those aged 12 years old), 200μg for pregnant women and lactating women, and 200μg for pregnant women and lactating women. 200 micrograms for pregnant and lactating women. Adults can get 120-150 micrograms of iodine by consuming 6-8 grams of standard iodized salt every day, which can fully meet the physiological needs of most adults. 3.Dietary principles for hyperthyroid patients: ① high protein, high calorie diet, increase the frequency of meals to reduce the negative nitrogen balance and weight loss; ② reduce stimulating foods, such as coffee, tea and alcohol; ③ supplement multivitamins; ④ supplemental water. 4, “low iodine diet”, please try to avoid the following foods: ① seaweed: kelp, seaweed, etc.; ② iodized salt, soy sauce and other salty condiments, etc.; ③ fish: marine fish (fresh scallops, etc.), clams, oysters, marine shrimp (including shrimp), pickled fish, etc.; ④ meat: processed meat, canned meat, etc.; ⑤ processed fruit: canned peaches, pickled fruit, etc.; ⑤ processed fruit: canned peaches, pickled fruit, etc.; ⑤ processed fruit: canned peaches, pickled fruit, etc.; ⑤ processed fruit: canned peaches, pickled fruit, etc.; ⑤ processed fruit: canned peaches, pickled fruit, etc. Processed fruits: canned peaches, pickled fruits, etc.; (6) Pickled vegetables, etc.; (7) Salted bread, soda crackers, salted foods, etc.; (8) Beverages: tea, etc.; (9) Medicines: iodine-containing cough drops, organic iodine preparations, and radiological diagnostic imaging agents, etc.; (10) Other: potato chips, pizza, salted nuts, etc. Please try to buy “low iodized salt” (or “non-iodized salt” if necessary) and consume it, or add less salt to your food.