The health consequences of severe obesity affect most of the organs in the body. Many of these can be greatly improved, or entirely resolved, with successful surgical weight-loss.
Most people have observed this, at least for short periods, after a weight loss by dieting. However with dieting, such benefits are usually not sustained because weight loss from diets often does not last for more than a few months. Several studies show that the weight loss achieved with Roux-en-Y Gastric Bypass can average 80 percent of excess body weight, and can be maintained for years following surgery.