Therefore, patients with IBD often have nutritional deficiency and protein-calorie malnutrition. The manifestations are: weight loss, hypoproteinemia, anemia, electrolyte disorder, vitamin deficiency and so on. This malnutrition further leads to the decrease of anti-infection ability of intestine and body, and the weakening of wound healing ability of intestinal ulcer. Therefore, in the process of preventing and treating IBD, nutritional therapy is undoubtedly an important measure, which can prevent the disease from worsening, improve the body's nutrition, and provide sufficient, beneficial and balanced nutrition for the recovery of intestinal function. Below, I will briefly introduce the nutritional treatment principles of these two kinds of IBD. It should be noted that, due to the different sensitivity of individuals to food, the "tofu block" diet in various newspapers should be avoided. Please don't copy mechanically, keep a clear head and choose a nutrition plan that suits you. 1. Principles of nutritional treatment for ulcerative colitis: (1) Ensure sufficient calories and protein: 2500-3500kcal/day, protein 100- 150g, so as to supplement protein lost in intestine and meet the needs of basic metabolism and tissue damage repair. (2) Ensure adequate vitamins and minerals, especially B vitamins, iron, zinc and calcium. (3) Food characteristics: low residue, liquid food/semi-liquid food/soft food, non-irritating, high calorie and high protein food. (4) If patients are intolerant of the above foods, they should reduce their intake and replace them with other foods with similar nutrients under the guidance of doctors and nutritionists. (5) Drinking water 1200- 1600ml. People with diarrhea should especially ensure that. When it comes to "liquid food/semi-liquid food", people have the impression that rice soup and noodle soup are low in calories, and it is difficult to provide balanced and sufficient nutrition and calories for IBD patients. Appropriate lean meat, fish, eggs, milk and vegetables with less dietary fiber (such as some melons) should be selected and ground or homogenized to different degrees for patients to take. At present, the nutrition departments of major hospitals in China also have enteral nutrition preparations (including powders and suspensions) specially for patients with intestinal diseases. Patients can consult a doctor when necessary and use natural food and nutritional preparations together. For health foods on the market, such as "* * protein powder", * * algae and * * grass, it is recommended that you use them under the guidance of a doctor. 2. Principles of Nutritional Treatment of Crohn's Disease Intestinal lesions are more extensive than ulcerative colitis, so protein-calorie malnutrition, anemia, vitamin deficiency and electrolyte disorder are more common. Because the absorption of calcium is seriously damaged, osteoporosis is prone to occur; When the lesion invades the end of ileum, it will also affect the absorption of fat. (1) Ensure sufficient calories, protein (2) Correct water-electrolyte imbalance and vitamin deficiency (3) Diet with less residue and low fat: the daily fat intake should be less than 40g. Oil or powder of medium-chain fatty acids (MCT) can be used, because MCT can be absorbed without passing through the intestine. (4) The villous structure of small intestine mucosa in Crohn's disease is damaged. If necessary, we should supplement the necessary diet under the guidance of a doctor to promote the absorption of nutrients and improve the intestinal mucosal structure. (5) The staple food should be refined, and coarse grains are prohibited. Non-staple food should ensure high-quality protein such as lean meat, eggs, fish and bean products. Milk is limited, and people with intestinal intolerance should avoid drinking milk to prevent diarrhea and bloating. (6) Minimize the food volume and improve the nutritional value of unit quantity. (7) Cooking methods mainly include: boiling, steaming, stewing and retting. No frying and thick seasoning.