gastric bypass risks and benefits
BENEFITS. 1  Gastric bypass surgery, in combination with diet and exercise, can successfully help patients lose 50-60% of excess weight over a period of about two years. Other procedures can result in as much as 80% loss of excess weight.
A serious complication after gastric bypass is a leak. Leaks can happen anywhere in the stomach or intestines. Your GI Tract (mouth, esophagus, stomach, intestines, and colon) is one continuous tube. During gastric bypass surgery, the tube is cut and sewn to re-arrange the bowel.