Weight loss after partial or total gastrectomy plagues many postoperative patients. It is currently believed that insufficient intake of nutrients is the main cause of weight loss. 1. The most common clinical situation is that due to the occurrence of fear of obstruction and other conditions, some patients are discharged from the hospital for a long period of time to eat only liquid food such as thin porridge and noodles, thus leading to nutritional deficiency. In addition, because they find it troublesome to eat more than 5 meals a day after discharge, and the amount of food eaten at each meal is still small, the total amount of food eaten is insufficient and results in weight loss. The above two situations are what the patients and their families need to pay special attention to. 2.Some patients restrict the amount of food they eat because of the discomfort after eating, which leads to the reduction of body weight. It is necessary to consult the treating physician according to the condition, and if necessary, it may be necessary to try some drugs to combat the symptoms or additional nutritional support. 3. The digestion and absorption of most nutrients are not greatly affected in post-gastrectomy patients. However, the absorption of some special nutrients such as vitamin B12 will be impaired to some extent. In addition, the absorption of iron, calcium and phosphorus will be affected as well. It needs to be paid attention to and tested after the operation. Three parts treatment, seven parts nourishment” after gastrectomy diet is very important: 1, the diet should be nutritious, with reasonable, to achieve a comprehensive, balanced nutritional intake. 2, to a small number of meals, 5-6 meals per day, should not be too full, but also should not be too little. Should be regular and quantitative meals, so as to facilitate digestion and absorption. If necessary, intermittent intravenous supplementation or elemental diet should be given. Such long-term dietary regimen is not only beneficial for postoperative recovery, but also prevents other diseases caused by insufficient nutrition. And lay the foundation of physical fitness for subsequent treatment. 3. Regarding the content of the diet, the following comments are for reference Adequate caloric energy supply Insufficient caloric energy intake will lead to negative nitrogen balance and weight loss. The main source of providing energy is starch and other staple foods. High protein diet A high protein diet should be supplemented after gastrectomy. Choose foods that are easy to digest, high in essential amino acids (amino acid foods) and complete in variety and physiology, such as eggs, fish, shrimp, lean meat, soy products, etc. Moderate intake of fat The postoperative fat should be provided with fats that are easy to digest and absorb, such as vegetable oil, cream (oil food), egg yolk, etc., which are generally not easy to cause diarrhea. In a few patients, the digestion and absorption of fat is impaired after surgery, triggering steatorrhea, and the intake of fat should be reduced at this time. However, patients with high blood lipids or with cardio-vascular diseases, diabetes and other bases should pay attention to reduce the intake of saturated fatty acids. Consume more foods with high iron content After major gastric resection, the body’s absorption of mineral elements such as iron is hindered; therefore, postoperative patients can choose more foods with high iron content to prevent anemia. For example, soybeans, animal offal, fresh vegetables (vegetable food), etc. Severe anemia can be treated with optional medication. Consume more foods with high calcium content For patients with metabolic gastroparesis after surgery, in addition to increasing foods with high protein rich in vitamins, more foods with high calcium content, such as milk and fish, should be consumed to treat metabolic gastroparesis. It is also appropriate to add supplementary medications that facilitate calcium absorption, such as cod liver oil. Fiber supplementation Fiber has been recognized as the seventh nutrient, although it cannot be digested and absorbed, but it has a very important role in maintaining the normal physiological function of the intestine. It is also very important for the prevention of cardiovascular and cerebrovascular diseases and the prevention of diabetes. Please don’t forget to supplement fiber in your recipes. 4.Cautions about eating According to the patient’s tolerance, choose, slower emptying, less residue easy to digest food to prolong the time of food passing through the small intestine, which is conducive to food digestion and absorption. If soup or beverage is to be consumed, care should be taken to eat 30-45 minutes before or after the meal as much as possible, and to separate dry and thin foods to prevent dumping syndrome and other conditions. After the meal, you can rest in the lateral position to prolong the emptying time of food.