How much weight can I expect to lose?
The amount of weight people lose after bariatric surgery depends on the individual and on the type of surgery he or she had. A study following people for 3 years after surgery found that those who had gastric band surgery lost an average of about 45 pounds. People who had gastric bypass lost an average of 90 pounds.1 Most people regained some weight over time, but weight regain was usually small compared to their initial weight loss.
Researchers know less about the long-term results of gastric sleeve surgery, but the amount of weight loss seems to be similar to or slightly less than gastric bypass.
Your weight loss could be different. Remember, reaching your goal depends not just on the surgery but also on sticking with healthy lifestyle habits throughout your life.
Source https://www.niddk.nih.gov/health-information/weight-management/bariatric-surgery/types
