What happens to the rest of the stomach?
The stomach, along with the first parts of the small intestine (duodenum and first part of the jejunum) remain in place and still function after gastric bypass operation. Digestive factors and enzymes are still produced. However, no food travels through this bypassed portion of the gastrointestinal tract. This is one of the major reasons why certain lifelong vitamin and mineral supplements are required after gastric bypass surgery.
