Among all the nutrients required by the human body, only sugar, protein and fat can provide heat, which are called “thermogenic nutrients”. In general, 50%-60% of the calories required by the human body are supplied by sugar, 10%-20% by protein and 20%-25% by fat. The average person eats 30 calories (Kcal)/kg per day as a normal diet. Daily calorie requirement (Kcal) = standard weight (kg) × 30 I. Diet food (i.e. low-calorie food) 1. staple food: whole wheat bread, corn, cereals, oatmeal. 2.Vegetables: winter melon, cucumber, loofah, radish, tomato, bamboo shoots, spinach, pepper, garlic, etc. 3.Meat: rabbit, beef, lamb, skinless chicken and duck, halibut, shrimp, etc. 4, seafood: kelp, jellyfish, seaweed, shrimp, seaweed, etc. 5, edible mushrooms: black fungus, shiitake mushrooms, mushrooms, etc. 6.Beans: soybeans, mung beans, red beans and processed products of beans (tofu, soy milk, etc.). 7, drinks: Pu-erh tea, oolong tea, etc. Second, weight loss diet control methods 1, food reduction therapy: according to the daily calorie intake of 20 Kcal/kg standard feeding method. 2, low-calorie diet: according to the daily calorie intake of 15 Kcal/kg standard eating method. This diet emphasizes the application of fruits, vegetables, cereals, and protein-based foods, such as lean meat, beef, and other low-fat foods, as well as cabbage, winter squash, and other bulky dishes, in addition to beans and seafood, which are also part of the low-calorie diet and have the characteristics of low calories and high fiber levels. In short, the low-calorie diet emphasizes that the daily fat energy supply accounts for less than 10% of the total calories, and the daily calorie intake is 1000~1200 Kcal. 3. Very low-calorie diet: The method of eating according to the standard daily calorie intake of 10 Kcal/kg. This treatment can achieve good results in the short term, but has many side effects, which may cause ketoacidosis, electrolyte disorders, cardiac arrhythmia, hyperuricemia and rapid rebound. This diet emphasizes not eating staple foods and eating 400-800 Kcal per day, preferably under medical observation and guidance, and is not usually recommended.