Iodine-restricted diets are necessary for 131 iodine treatment of either hyperthyroidism or thyroid cancer because: Necessary Reasons for Iodine-Restricted Diets If iodine restriction is not sufficient: (1) Radioactive iodine uptake by the thyroid gland becomes less. (2) With GD, the amount of radiation exposure to the thyroid gland is reduced and the desired therapeutic effect is not obtained. (3) For the treatment of thyroid cancer, the effect is also less obvious. And it makes the judgment in the treatment more difficult. (PS: The radioactive iodine used for treatment is very small, equivalent to one thousandth to one ten thousandth of the iodine content in 1g of kelp. Therefore, the accuracy of the examination, good therapeutic effect, must be limited to iodine diet) Treatment before and after the control of food 1, absolutely can not eat the food: (1) seaweed: kelp, wakame, goat’s beak, sea containers. (2) Kelp processed products: kelp in yam juice, kelp strips, kelp salted cooked sea food, kelp tea, etc.. (3) Kelp seasonings, kelp soup. (4) Foods containing kelp juice: instant miso juice, kelp soup mix, kelp soy sauce, etc. In seasonings sold on the market , kelp soup contains kelp extract, so be sure to pay attention to its ingredients. (5) Iodized eggs. Iodine-fortified salted eggs contain a lot of iodine. 2, as far as possible not to eat the food: (1) stone cauliflower processed products. Cold days, cold noodles, konjac and so on. (2) Fish and shellfish. Cod and its processed products. Green body fish????? Mackerel, sardine, bonito, herring. Red body fish???? Tuna, salmon, canned tuna. Shellfish, shrimp, crabs. (3) Meat. Offal parts contain iodine. (4) Foods containing karaginan. Soymilk, sauces, jellies, puddings, ice cream, etc. Karaginan is a food additive produced from seaweed, and if it is contained, it is indicated as [viscosity builder, stabilizer, gelatinizer, mucopolysaccharide-adding]. Iodine is also added to supplementary nutritional foods and natural foods. In Europe and the United States, salt is often added with iodine, and foods with a lot of salt (French fries, nuts, ham, bacon, salted beef, etc.) are controlled. If these foods mentioned above are eaten once, you can eat them without worrying, and they cannot be eaten repeatedly. 3. Foods that can be eaten: (1) Soups: Shiitake mushrooms, chicken broths, meat broths, clear soups, and white soups. (2) Grains: rice, bread, noodles. Kelp soup cannot be used as soup after rice. (3) Vegetables: yellow-green vegetables. (4) Legumes: tofu, fried tofu, natto, thick oil tofu, all soy foods, moong dal, boiled beans. (5) Meat: Beef, pork, and chicken except offal parts. (6) Eggs: One egg per day other than iodized eggs. (7) Milk: 200ml per day is sufficient. (8) Beverages: Coffee, fruit juice, green tea, oolong tea. Note: Products to which the flavoring ingredient “kelp extract” has been added. Please pay attention to the indication of the ingredients. You can eat taro, mushrooms, and fruits.