The so-called stomach reduction surgery involves cutting out the greater curvature of the stomach vertically through laparoscopy, resulting in a small stomach pouch of about 150cc, which holds about 4-5 ounces of food. Reducing the capacity of the stomach can bring down the amount of food an obese person eats besides. It also reduces the amount of appetite hormones secreted by the stomach, which reduces the patient’s appetite. In addition to the truncation of the small intestine to rearrange the position of the small intestine to change the pathway of food, slowing down the speed of gastric emptying, reducing the absorption of gastric relief food to the intestines and stomach fat. Such a two-pronged approach is an effective way to lose weight at high speed. The medical community has found that food speeding up into the intestines helps heal type 2 diabetes. Can the dangers of stomach reduction surgery for weight loss be controlled? Although the procedure is very safe, there are certain things to be aware of. First of all, the patient’s eating habits will change dramatically after the procedure, and eating too much or too quickly may cause nausea and vomiting. Some patients need a longer period of time to change their diet. The diet should be mainly liquid for 2 weeks, soft food for 2-4 weeks and then solid food can be added slowly. Sometimes it may take 3-6 months to get used to it. Slight vomiting and gas are common. Food intake will gradually increase after 6 months. In about a year, you will feel full after eating half a sandwich and half a drink. It is important to realize that progress varies from person to person. Eat smaller and slower portions and separate food and drinks as much as possible during meals. About 1/5 of the patients may have acid reflux after surgery and may need medication. Generally, this condition will subside in 6-12 months. A dietitian should provide long-term dietary counseling for six months after surgery to avoid malnutrition.