How does bariatric surgery work?
The surgery is undertaken laparoscopically through small puncture holes in the abdomen to support weight loss by limiting your food intake. It also reduces the absorption of nutrients by the digestive system and stops the normal signaling from the stomach to the appetite centre in the brain, thereby effectively reducing food cravings.
The small pouch at the top of the stomach, created during the bariatric surgery, quickly fills and stretches. This activates signals to the brain to powerfully switch off appetite to prevent overeating. Bypassing the first part of the small intestine also causes dramatic changes in gut hormones secreted in response to food, thereby restoring the hormones to levels seen in lean individuals. You will generally find that you will feel satiated, or full, after eating smaller portions of food.