People feel hungry because the “hunger hormone (Ghrelin)” is at work, which is a hormone secreted by the stomach and works in the body to promote the release of growth hormone from the pituitary gland, and also strongly stimulates the appetite and causes eating. So how to lose weight? What are the steps of surgical weight loss sleeve gastrectomy? Sleeve Gastrectomy: The full name is laparoscopic gastric reduction surgery, also known as sleeve gastrectomy. The principle of gastric reduction surgery is to use a 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. It has the advantage of not requiring the placement of foreign objects in the body and the procedure is remarkably effective for weight loss. Method: 2-6 cm of the sinus above the pylorus is preserved in the direction of the greater curvature of the stomach, and the larger part of the stomach is removed along the long axis of the stomach, with the entire fundus removed, leaving a “banana-shaped” stomach with a volume of about 60-80 ml. Principle: To reduce the volume of the stomach and decrease the secretion of hormones that stimulate the production of hunger. Advantages: It does not change the physiological state of the gastrointestinal tract and does not interfere with the normal process of digestion and absorption of food. Evaluation: Sleeve gastrectomy has good therapeutic effect on type 2 diabetes and is now a widely used surgery for weight reduction and diabetes in Europe. Effectiveness of the procedure: Studies have shown that patients who underwent bariatric and diabetic surgery were able to achieve complete glycemic remission in patients with type 2 diabetes compared to those who underwent only conventional medication. Diabetes remission is defined as glycosylated hemoglobin <6.5% and no medications. In addition, weight loss and diabetes surgery can significantly address or improve type 2 diabetes and other obesity comorbidities. Studies have shown that bariatric and diabetic surgery resolves or improves diabetes in 86% of patients, improves hyperlipidemia in 70% or more of patients, resolves or improves hypertension in 78.5% of patients, and resolves sleep apnea in 85.7% of patients. Along with blood glucose control, undergoing weight loss and diabetes surgery also reduces medication use for complications such as diabetes, hypertension and hyperlipidemia, and provides varying degrees of improvement in patients' overall health, emotional well-being, physical and social functioning, pain relief and personal energy recovery.