Gastric bypass is a surgical procedure that helps individuals lose weight by reducing the size of the stomach and rerouting the digestive system. During the procedure, a small pouch is created at the top of the stomach, limiting the amount of food it can hold. This pouch is then connected directly to the small intestine, bypassing a portion of the stomach and the upper part of the small intestine. As a result, patients feel fuller faster and absorb fewer calories from the food they eat, aiding in weight loss and improved health outcomes.