Why does bariatric surgery allow for weight loss? What other conditions can it treat? For those who are heavily obese and repeatedly gain weight, weight loss surgery (laparoscopic surgery on the stomach and intestines, not liposuction or anything like that) is the only way out. However, many fat people, or their family members and friends around them have a lot of misunderstandings about weight loss surgery, for example, they think that surgery is just to make people eat less, or they think that the obesity caused by endocrine disorders is impossible to be solved by surgery, and so on. In fact, the mechanism of bariatric surgery is not as simple as you think. In addition to treating obesity, bariatric surgery can also treat a variety of metabolic diseases. Why can weight loss surgery help you lose weight? 1, reduce the intake and absorption of food, thus reducing the energy intake and sugar metabolic load. Does surgery mean that you eat less? It is true that you will eat less after weight loss surgery, whether it is a sleeve gastrectomy or gastric bypass surgery, which shrinks the stomach and allows you to eat less. After eating less, you will naturally not have too much energy stored in your body, and you will naturally lose weight. But this is only one of the factors of weight loss, or this is only the most intuitive mechanism. 2.: Changes in the hormones of the gastrointestinal tract. For example, hunger hormone secretion decreases after surgery to remove the fundus of the stomach, thus making you lose your appetite. 3,: The reconstruction of the gastrointestinal tract after surgery changes the neuroendocrine regulation of the intestine-pancreatic axis and the intestine-brain axis, eliminating insulin resistance and increasing the basal metabolic rate, thus achieving weight loss. 4.Serum bile acid changes after weight loss surgery. It is found that there is a significant increase in serum bile acid concentration after gastric bypass surgery in both fasting and postprandial periods, and bile acid can make our adipose tissue burn, which can effectively consume fat and fight obesity. 5.Surgery changes the intestinal flora. Healthy intestinal flora can increase the process of lipolysis and fatty acid oxidation in fat cells, which in turn reduces fat accumulation. What other diseases can weight loss surgery treat? 1, Effective treatment of various metabolic diseases. Many people think that they are obese due to endocrine disorders and have to see gynecologists and endocrinologists, which is correct. But in fact, the vast majority of endocrine disorders in obese people are caused by obesity, obesity is the cause and endocrine disorders are the result. Obesity can cause disorders of insulin and glucose metabolism, leading to type 2 diabetes, hypertension, fatty liver, hyperlipidemia, hyperuricemia, polycystic ovary syndrome and many other metabolic diseases. Therefore the root cause of obesity problem is solved, these related metabolic syndrome will be improved, or even cured. 2, reduce the risk of 13 kinds of malignant tumors. Research shows that the occurrence of many kinds of malignant tumors is related to obesity. Weight reduction surgery can help reduce the risk of 13 kinds of cancers such as breast cancer, pancreatic cancer, liver cancer, colon cancer, endometrial cancer, ovarian cancer, rectal cancer, gallbladder cancer, esophageal adenocarcinoma, renal cell cancer, meningioma, thyroid cancer and multiple myeloma. 3.Effectively improve the obesity-related diseases. For example, it can improve obesity-related sleep apnea syndrome, depression, osteoarthritis, etc.