Low protein diet: When the body is in acute and chronic nephritis, acute or chronic renal failure, protein metabolites in the body can increase the burden on the kidneys and aggravate the symptoms, it is necessary to reduce the protein intake so that it can only maintain the operation of physiological functions to the degree. The amount of protein required to maintain basic physiological functions is about 0.4 – 0.6 g/(kg body weight/day), which is only 50% – 60% of the normal situation. To achieve such an intake standard, one needs to choose things very carefully, especially those foods that are rich in protein. The above weights are standard weights, i.e. height (cm) – 105, not actual weight; one egg contains 8 grams of protein, one bag of milk (250 ml) contains 8 grams of protein, 50 grams of lean meat contains 8 – 10 grams of protein. Common food (per 100 grams) protein content: lean meat 21.3, eggs 12.9, carp 11.7, tofu 11.1, milk 3.0. Sodium in restricted matter food should generally be selected from varieties containing less than 100 mg of sodium per 100 grams, such as beef, lean meat, chicken, cabbage, lettuce, winter squash, loofah, tomatoes, various fruits, etc. Those containing more than 200 mg of sodium per 100 grams Foods such as beef jerky, soda crackers, plums, oil cakes, tofu, mushrooms, purple cabbage, sesame paste, Sichuan winter vegetables, snow cabbage, shrimp, marinated and pickled foods, tend to make the total sodium intake exceed the standard. Common foods high in potassium: mushrooms, dried cinnamon, yellow cauliflower, purple cabbage, dried vegetables, wood ear, shiitake mushrooms, dried red dates. Fruits with high potassium content include watermelon, banana, pineapple, dates and melon, etc. Vegetables include amaranth, spinach, celery, carrots, bamboo shoots, potatoes, lentils, taro, kelp, mushrooms and parsnips, etc. Potassium in various foods is mostly concentrated in cereal peel, fruit peel and chicken, such as finely processed grains contain lower potassium than coarse grains, peeled fruits have lower potassium content than peeled ones, and fatty meat has lower potassium content than lean meat. Because potassium is easily soluble in water, thick vegetable soups, fruit juices and broths contain a considerable amount of potassium, and canned and boiled fruits with the soup removed have a lower potassium content than fresh fruits. The calcium contained in milk and milk products has a high absorption rate. Common foods with high calcium content: fennel, green amaranth, snow lettuce, rape moss, kale and other dark green vegetables, small radish tassels; lemon; sesame paste, peanuts, pine nuts; sea cucumber, fish, nori, kelp and small fish and shrimp that can be eaten with bones and shells; fungus, mushrooms, egg yolk, beans; fully ground animal bone powder as a source of calcium, which has a as much as 20 percent. Phosphorus is widely distributed in food, lean meat, eggs, milk, animal liver and kidney are high in content. Kelp, nori, peanuts, dried beans, nuts, and coarse grains are also rich in phosphorus. Vegetables, melons, fruits, almonds, pig’s blood, egg whites, sea cucumbers, oils and other foods have a low phosphorus content.