Obesity has become a worry for many people in today’s materialistic era. In order to eliminate the enemy of obesity I believe that we have done a lot of struggle: diet pills? Diet control? Either the effect is not good or not enough willpower ah! Now, we have another powerful weapon to deal with obesity – surgery. At present, there are two kinds of mainstream weight loss surgery: gastric diversion surgery and sleeve gastrectomy. The so-called gastric diversion surgery is a change in the way food is digested through the body’s internal digestion. The stomach is divided into two, one large and one small, and the larger part of the stomach and part of the intestine are transferred to the intestine “downstream” of the digestive tract, while the intestine “downstream” is dragged up and connected to a small gastric sac of about 30 ml volume. In this way, the small gastric sac does not hold much food, and we feel full after eating a little. Sleeve stomach surgery, as the name implies, is to cut off a part of the original “big belly” stomach, so that the stomach is as “slim” as a sleeve. With a smaller stomach, the appetite is naturally smaller and the weight can be reduced accordingly. Compared to gastric diversion surgery, sleeve surgery does not involve a major effort on the intestine, so the after-effects of the surgery are relatively minor. Of course, all surgeries have a range of applicability. For people who are simply obese, surgery is generally possible when the BMI (weight kg/height squared m2) is greater than 32.5. For people who are obese and have diabetes at the same time, surgery should be actively considered when the BMI is greater than 27.5. It is also required that the patient is a type 2 diabetic, that the time of discovery of diabetes is <15 years, and that the body still has a relatively good function of insulin secretion (specific indicators need to be checked in the hospital, so I will not elaborate here). In addition, age is also one of the factors to be considered for surgical treatment, generally requiring age <65 years. So, is it possible to eat whatever you want after the surgery? The answer is no. After surgery, we still have to follow the doctor's instructions strictly in choosing food and taking daily supplements of essential vitamins, minerals and trace elements (in fact, taking a few pills every day).