Gastric bypass is a surgery that make your stomach small and at the same time it will change how it handles the food you eat and make you lose weight. Your stomach will work better with your small intestine. You will feel full with less food.
In this surgery your surgeon will use staples to divide your stomach into two sections one small (the upper section) and a large one (bottom section). The small one is often called “the pouch” and all the food you eat goes there. The pouch is about the size of a walnut. It holds only about 1 ounce of food.
When your stomach is divided your surgeon will connect a small part of your small intestine to a small hole in your pouch. The food you eat will now go from the pouch into this new opening into your small intestine. With this your body will get fewer calories.