The difference between bariatric surgery gastric bypass and gastrectomy? Some people may not know much about bariatric gastric resection surgery, but in some European and American countries, gastric reduction surgery has become the mainstream of weight loss methods, with an average of hundreds of thousands of people having surgery to lose weight each year. In some large hospitals in China, the technology of gastric reduction surgery has long been developed and mature. Gastric bypass surgery: The principle of gastric bypass surgery is simply that food is rerouted from the upper part of the stomach and no longer passes through the lower part of the stomach and duodenum, thus reducing the absorption of nutrients by the body and thus achieving the purpose of reducing or curing obesity. The main advantage of gastric bypass surgery is that it is effective and long-lasting in terms of weight loss. In patients with obesity combined with diabetes, the effect of blood glucose control is more obvious. The disadvantage of the surgery is that it changes the structure of the gastrointestinal tract and the operation is complicated and difficult, requiring the surgeon to be technically proficient and the operation takes a long time. The side effects are possible rupture of the suture, leakage and even infection, as well as malnutrition and hair loss. Gastric bypass surgery is not the removal of the stomach and intestines. It is simply dividing the stomach into two parts, reducing the food intake of the part of the stomach that contains food; then vacating a section of the small intestine, rearranging the position of the small intestine, and reducing the absorption of calories by the small intestine. This works both ways to lose weight. Gastrectomy: Laparoscopic Gastrectomy, also known as Laparoscopic Sleeve Gastrectomy, is a procedure that uses a laparoscope to cut out the large curve of the stomach vertically, creating a small stomach sac of about 150cc, which can hold about 4-5 ounces of food. It also reduces the amount of Ghrelin, a hormone that stimulates appetite, so appetite is reduced and less food is eaten. The benefit is that it does not require the placement of foreign objects in the body and the procedure is highly effective in weight loss. Weight loss surgery can reduce 60-80% of your excess body weight, and the results can be even better if your post-operative diet and exercise habits are well coordinated, with the support and assistance of a professional health care provider.