<s>[INST] How does weight loss surgery help to reduce excess weight? [/INST] Weight loss surgeries are known as metabolic surgery since it changes the disease metabolism of obesity. These surgeries induce various hormonal changes that reduce excessive cravings and improve the satisfaction of eating; thereby reducing the overall intake of food. Certain malabsorptive procedures like gastric bypass prevent absorption of fat consumed. The hormonal changes increase the BMR of the patient and all the fat deposited slowly gets converted into energy and melts and disappears. It is actually a myth that patients cannot eat after bariatric surgery. Source: LOC. Link: https://obesityasia.com/faqs/. Field: Endocrinology. Disease: Obesity </s>