Gastric bypass is surgery that helps you lose weight by changing how your stomach and small intestine handle the food you eat and is performed by a surgeon under general anesthesia in 2 steps.
The first step is to make your stomach smaller using staples to divide your stomach into a small upper section and a larger bottom section.
The top section of your stomach is where the food you eat will go. The second step is to have the bypass by connecting a small part of your small intestine (the jejunum) to a small hole in your pouch.
The food you eat will now travel from the pouch into this new opening and into your small intestine.