For gastric bypass and sleeve patients, maximum weight loss occurs at approximately 12 to 18 months after surgery. You may continue to lose weight for as long as two years.
After that, weight loss levels off. There is usually a slight regain of around 5 to 10% of your weight loss around the two-year mark.
This is typically the maximum weight regain. However, if your weight begins to creep up beyond what you expect, talk to your doctor about what might be causing you to gain weight.
If you return to your old eating habits, it’s possible to overcome your bypass operation and experience significant weight gain in the future.