During the first year to year and a half after gastric bypass surgery, patients lose 70% of their excess weight, on average. That being said, some patients start gaining weight back within 12–18 months, degrading their initial results. According to the Cleveland Clinic, this is almost always related to diet.
The ASMBS says studies show that 90% of patients maintain at least 50% of their weight loss for up to two decades. Typically, maintaining 50% of your weight loss five years after surgery is considered a success.Â
Surgery is a tool, not a cure for obesity. Dr. Garber recommends that patients stick to a high-protein, low-carbohydrate diet and regular exercise regimen to lose weight and maintain their results. He also suggests avoiding carbs, sugar, and fatty foods and taking supplements, like vitamin B12, iron, and calcium regularly.
Beyond sheer weight loss, gastric bypass patients typically see their cardiovascular health, energy levels, and quality of life improve following surgery.
According to a 2011 study, infertility problems related to obesity tend to improve after significant weight loss from gastric bypass.
