After surgical weight loss, you will lose 60-70% of your extra weight. To calculate your anticipated weight loss, subtract your ideal body weight based on your height, from your current weight. You may lose more depending on your determination and on your activity level. You will lose most of this weight in the first six months and will continue to lose for up to two years. After two years, it is most likely that you will have reached your maximum weight loss.

Statistically, you have about an 85% chance of keeping at least 50% of your extra weight off for the rest of your life following surgical weight loss. Some patients will put some weight back on and an occasional patient will put all of it back on. The causes of weight gain following surgical weight loss are the staples coming undone or the pouch stretching out so much that you can eat a full meal. That is why it is so important to follow the diet guidelines after the surgery. It is also important to realize that surgical weight loss can be a tool to help patients, but its effectiveness can be undone by overeating.