Roux-en-Y Gastric Bypass is both a restrictive and a malabsorptive procedure. It limits the amount of food intake and as well as the types of food that can be eaten.
The Roux-en-Y gastric bypass procedure involves creating a stomach pouch out of a small portion of the stomach and attaching it directly to the small intestine, bypassing a large part of the stomach and duodenum. Not only is the stomach pouch too small to hold large amounts of food, but by skipping the duodenum, fat absorption is substantially reduced.
