Laparoscopic sleeve gastrectomy is a surgery where doctors make your stomach much smaller so you can’t eat as much food. During the surgery, they take out most of your stomach and leave behind a small, banana-shaped part called a “sleeve.” After the surgery, you feel full quickly and don’t get as hungry, so you eat less and lose weight. People who get this surgery usually lose a lot of weight over time — sometimes more than 50% of their extra body weight in the first year. It’s a big decision, and it works best when people also make healthy changes to how they eat and move.