How much weight can you lose after gastric bypass surgery?
After gastric bypass surgery, many patients lose between 60% and 80% of the excess weight they are carrying in a year to 18 months. The term “excess weight” means the difference between how much you weigh now and what is considered your “ideal” weight. If a person weighs 350 pounds and their ideal weight is 160 pounds, they are carrying 190 pounds of excess weight. If they lost 70% of their excess weight, this would be 133 pounds, which would put their new weight at 217 pounds.