The gastric bypass is known as the “gold standard” for bariatric surgery that has been practiced since 1967. This procedure involves creating a shot glass pouch that is separated from the remainder of the stomach and attached it to the lower part of the small intestine. Since the size of the new stomach is reduced, you will feel full with less food. The bypassed portion of the stomach will continue to remain inside. This procedure is malabsorptive and restrictive with a 58% expected weight loss at 5 years.