Why is bariatric surgery used to treat diabetes? This type of surgery has been done in the United States for decades, starting in the 1960s and becoming available in the 1980s. But for reasons of recognition, this surgery is only used as a bariatric surgery. This surgery is gastric bypass surgery. Why is bariatric surgery used to treat diabetes? Gastric bypass surgery was first used for bariatric surgery, but later it was discovered that obese patients with type 2 diabetes had improved their diabetes symptoms after the surgery, and after several years of clinical practice, doctors accidentally discovered that the surgery was effective in treating diabetes, thus bringing a new gospel to diabetic patients. Type 2 diabetes has always been a medical disease, and the common treatment methods include diet control, exercise, oral hypoglycemic drugs and insulin, etc. However, all of these medical treatments cannot guarantee that the patient’s blood glucose returns to normal levels and cannot prevent the emergence and further aggravation of various diabetic complications. In the early 1980s, the medical community unexpectedly discovered that a type of surgery for weight loss could “incidentally” cure type 2 diabetes. The international medical community spared no effort in studying the reasons (mechanism of action) for this unorthodox procedure, and although it was only a bunch of conjecture at the time, the treatment of type 2 diabetes through bariatric surgery such as gastric bypass GBP has shown considerable promise and has gradually begun to be applied in clinical practice. Characteristics of the surgery: The causes of diabetes: First, K cells distributed in the gastrointestinal tract are stimulated by food to secrete insulin resistance factors, causing the body to develop insulin resistance. Second, islet cells are damaged and apoptotic under the action of insulin resistance factor. The unique feature of gastric bypass surgery is that the physiological flow of food is changed, which is accomplished through the steps of gastric block, gastrointestinal anastomosis, and enteroenteric anastomosis. After the surgery, insulin resistance in the patient’s body is eliminated, and the way food flows through the body after the surgery also promotes insulin secretion in the patient’s body, reduces apoptosis and proliferates islet cells, restores islet function, and cures diabetes. In addition to the normalization of blood sugar, the patient recovered well from a series of accompanying complications. For example, retinopathy, diabetic nephropathy, diabetic dermatitis, diabetic sexual dysfunction, hypertension, hyperlipidemia, etc. were gradually cured. The occurrence of serious complications has been eliminated, and the occurrence of disabling and fatal situations has been avoided. Gastric bypass surgery (GBP), with less trauma, lower risk, faster recovery and no recurrence; most of the patients recovered to normal blood sugar before discharge after surgery and stopped using hypoglycemic drugs and insulin; a small number of patients have a slightly longer recovery time, which mainly depends on the extent of the patient’s preoperative islet function impairment. Patients who are treated early will recover more quickly and completely.