When it comes to weight loss surgery to lose weight, many friends are yearning for it and worried about its bad effects on the body, for this reason, to solve the 5 most common questions about weight loss surgery. A. What is weight loss surgery? The two main types of weight loss surgery are gastric bypass surgery and sleeve gastrectomy surgery. Gastric bypass surgery is the creation of a small gastric sac to reorganize the intestines and limit food intake and absorption. Sleeve gastrectomy surgery is to remove most of the stomach tissue and change the volume of the stomach, thus reducing food intake. Second, who is weight reduction surgery suitable for? According to the Chinese Guidelines for the Surgical Treatment of Obesity (2007), weight loss surgery can be performed for those who meet any one of the first three conditions and have the fourth condition; 1, BMI ≥ 32kg/m2; 2, suffering from obesity-related metabolic disorder syndrome; such as: diabetes, hypertension, fatty liver, sleep apnea syndrome, hyperlipidemia, etc., and the cut is predicted to be effective for weight loss. 3, male waist circumference ≥ 90cm, female waist circumference ≥ 85cm; dyslipidemia 4, no alcohol or drug dependence, no mental or intellectual impairment; 16-65 years old; understand the surgical approach and can accept the changes in post-operative life; other weight loss methods are not effective or cannot be tolerated. Third, how much can I lose with weight loss surgery? Generally speaking, if you recover well after surgery, you will be able to lose 60%-80% of your body weight, and even more with the help of diet and exercise. After the first month of surgery, the weight loss will be greater, and then it will slowly level off and stabilize. Fourth, is there any side effects or after-effects of weight loss surgery? The answer is yes. Gastric bypass surgery may result in slight malabsorption of nutrients due to the reorganization of the intestinal tract. This can be done with vitamin or trace element supplements. Youdao Doctor Group has a professional post-operative health management team to provide authoritative guidance for patients’ post-operative diet. V. How to choose a hospital for weight loss surgery? Although weight loss surgery is not a major surgery, the pre-operative doctor’s interview, confirmation that the patient meets the indications for surgery, and post-operative health management all require a professional and formal medical team. It is recommended to choose a regular tertiary hospital with rich experience in weight loss surgery.