Obesity is a state caused by excessive accumulation of body fat, especially triglycerides (triacylglycerides). It is usually caused by excessive fat accumulation in the body due to excessive food intake or changes in the body’s metabolism, resulting in excessive weight gain and causing pathophysiological changes in the body. So is surgery good for weight loss? Is stomach reduction surgery for fat people reliable? Gastric reduction surgery: Gastric reduction surgery is called laparoscopic gastric reduction surgery, also known as sleeve gastrectomy, the principle of gastric reduction surgery is to use the laparoscope to cut out the large curve of the stomach vertically, so that the stomach forms a small gastric sac of about 150cc, which can hold about 4-5 ounces of food. The benefit is that it does not require the placement of foreign objects in the body and the procedure is highly effective for weight loss. Gastric reduction surgery results: Gastric reduction surgery is a hot topic in the bariatric surgery community and its popularity has increased significantly. Because the surgery will cut off 80% of the stomach volume, in addition to reducing the amount of food eaten, it will also reduce the secretion of the hormone Ghrelin, which stimulates the appetite, and therefore the appetite will also be reduced. Within two years after the surgery, approximately 10-15 BMI or 70% of the excess weight can be lost. For those who have a high BMI (over 40) and have difficulty reducing their appetite, gastric reduction surgery can achieve the desired weight loss. Is gastric reduction surgery reliable? Gastric reduction surgery is somewhere between gastric bypass and gastric banding in terms of effectiveness and safety, making it a fairly “middle of the road” procedure. If compared to gastric bypass, gastric reduction surgery does not perform intestinal reconstruction, so there are no long-term sequelae such as anemia and osteoporosis due to vitamin deficiency.