Today’s young people like to overeat, stay up late, often consume high-calorie, high-fat food, lack of exercise, resulting in obesity, while from obesity to the onset of diabetes only takes a short time of three to five years! Does gastric diversion surgery work for obesity-induced diabetes? Why is obesity prone to induce diabetes? The sensitivity of obese people to insulin is reduced, and the function of fat cells in obese people is abnormal, which can lead to clinical abnormal changes such as insulin resistance and disorders of sugar and lipid metabolism. Some studies show that abdominal obesity, is an important factor in triggering insulin resistance, diabetes and metabolic syndrome and related atherosclerotic cardiovascular diseases. Obesity causes insulin resistance, and insulin resistance is the resistance of cells to the action of insulin, so that the efficiency of insulin action is reduced, and in order to overcome insulin resistance, a large amount of insulin will be synthesized, which will lead to increased damage to the function of the pancreas, which will in turn lead to the occurrence of diabetes and aggravate the deterioration of the disease. Weight loss is the key to lowering blood sugar: The causes of obesity are multifaceted, including genetic susceptibility and environmental factors, especially related to unhealthy dietary structure and a lifestyle of less movement. For patients with type 2 diabetes who are plagued by obesity, weight loss is an effective measure to lower blood glucose. Proper diet + appropriate exercise is the most economical and safe way to lose weight. The principles of reasonable diet are nutritional balance, variety of diet, scientific calculation of total calories, reasonable structure, high fiber, low salt, no alcohol and no sweets, etc. Exercise is mainly of medium intensity, adhering to the principle of gradual progress and avoiding high-intensity, high-confrontation exercise. It is advisable to start exercising one hour after a meal, not on an empty stomach or immediately after a meal, to avoid hypoglycemic reactions or affecting the digestion and absorption of food. However, in addition to the diet + exercise approach, weight loss surgery is also one of the safest and most effective medical weight loss approaches for patients who are particularly obese or whose weight loss through diet and exercise is ineffective. The reason why gastric diversion surgery is able to treat diabetes in one go and achieve clinical cure is that the unique feature of gastric diversion surgery is that it changes the physiological flow of food, which is accomplished through the steps of gastric blockage, 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 proliferation of islet cells, restores the function of the pancreas, and cures diabetes.