I am very interested in bariatric surgery and wonder what I can expect to lose?

The average weight loss for a gastric bypass is 65 to 75 percent of your excess weight over a 12 to 18 month period. The average weight loss for the sleeve gastrectomy procedure is 55 to 60 percent of your excess weight over 12 to 18 months. And the average weight loss after gastric banding is 43 percent of your excess weight over a 3 year period.