Gastric bypass operations that restrict food intake and cause malabsorption result in more weight-loss than those operations that only restrict food intake. Patients who have bypass operations generally lose two–thirds (80%) of their excess weight within two years.
Treatments for Weight-Loss Surgery
Gastric sleeve surgery or sleeve gastrectomy involves stapling approximately 70-80 percent of the stomach's natural capacity without involving the intestinal tract.
Weight-loss surgery is typically very effective when patients follow their dietary and exercise plans, but in 20-30 percent of cases, these procedures may not produce lasting weight loss results and regaining weight may occur.