Gastric bypass isn't for everyone with obesity, however. It's a major procedure that poses

Weight-loss surgery changes the anatomy of your digestive system to limit the amount of food you can eat and digest. The surgery aids in weight loss and lowers your risk of medical problems associated with obesity. Gastric bypass is the favored bariatric surgery in the United States. Surgeons prefer

Also called: Bypass surgery, Gastric banding, Obesity surgery. If you're very overweight and can't lose pounds with a healthy diet and exercise, surgery might be an option for you. The surgery is usually for men who are at least 100 pounds overweight and women who are at least 80 pounds overweight. If you are somewhat less overweight, surgery still might be an option if you also have diabetes, heart disease or sleep apnea.