Estimated weight loss from ESG is about 15-20% of the starting total body weight or 60-70% of excess body weight at 1-2 years following the procedure. This in conjunction with a low fat diet and adequate exercise may even enable you to lose more weight than the projected range. Other health benefits, in addition to weight loss, include improvement in gastroesophageal reflux, high blood pressure, type 2 diabetes, high cholesterol, fatty liver, and obstructive sleep apnea.