Roux-en-Y Gastric Bypass Surgery: a Restrictive and Malabsorptive Procedure
According to two organizations, the American Society for Bariatric Surgery and the National Institutes of Health, Roux-en-Y (pronounced ROO-en-why) gastric bypass surgery is the most popular bariatric surgery in the United States.

In this procedure, the surgeon creates a small stomach pouch and then constructs a “bypass” for food. The bypass allows food to skip parts of the small intestine. By skipping a part of the small intestine, the body cannot absorb as many calories or nutrients.