A gastric bypass is a type of weight-loss surgery that changes the digestive system to help people lose weight. During the procedure, a small pouch is created at the top of the stomach and connected directly to the small intestine, avoiding a large part of the stomach and the first section of the small intestine. This reduces the amount of food the stomach can hold and changes how nutrients are absorbed in the intestines. As a result, patients feel full sooner and absorb fewer calories from the food they eat. Gastric bypass surgery is typically recommended for individuals with severe obesity who have not been successful with other weight-loss methods. It can lead to significant weight loss and improvements in obesity-related health conditions, such as type 2 diabetes and high blood pressure.

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