The effectiveness of bariatric surgery in treating diabetes is well documented, and many diabetics who undergo the procedure are able to get off their medications and return to a relatively normal life, with their blood sugar remaining stable for a long period of time. This is why some people refer to this treatment as a “cure”, but our weight loss surgeons generally refer to it as a “reversal”. Reversal and cure are two different concepts. Cure means that the doctor removes the cause of the patient’s disease after various treatments, allowing the patient to return to his or her pre-disease state; whereas reversal is the improvement of the patient’s disease through treatments or interventions, allowing the patient to remain in a relatively healthy state. The cause of diabetes is the damaged function of pancreatic islets, insufficient insulin secretion so that the body can not effectively regulate blood glucose, so the cure for diabetes can only be the pancreatic islets completely repaired, but the current level of medical care can not do this. The weight loss metabolic surgery for diabetes is to reduce insulin resistance and directly lower blood sugar to reduce the pressure on the pancreatic islet organs to regulate blood sugar, and at the same time repair part of the pancreatic islet β-cells function, so that the body can autonomously complete the regulation of blood sugar. From this we can see that the weight loss metabolic surgery just improves the environment of blood sugar regulation through various means such as losing weight, reducing food intake, improving hormone secretion, etc., so that the body can regain enough blood sugar regulation ability. Therefore, although patients can stop taking medication after the surgery, they still need to pay more attention to their diet and living habits, etc. If they often eat foods with high glycemic index or lack of exercise, it is still possible for their blood sugar to rise again.