Just wondering what the average weight loss is after gastric bypass. Had surgery almost 3 weeks ago and have only lost about 15 pounds. I am following everythng the doctors tell me and am walking every day. Just afraid my weight loss is to slow., The Vertical Sleeve Gastrectomy (VSG) is rapidly emerging as one of the weight loss surgery procedures that patients choose the most. For some bariatric surgeons and patients, the VSG has replaced the Proximal Roux-en-Y (RNY) Gastric Bypass as the most popular weight loss surgery currently done. Removal of the upper outer stomach - the primary source of ghrelin (appetite stimulating hormone , I was wondering if anyone could tell me what their average weight loss was for the pre-op liquid diet. I know some people only had to do 5 days, or a week, but I am supposed to do 2 weeks! And I can only have shakes made by Bariatric Advantage, , In my experience, patients who have a VBG to bypass will lose about 60-65% of their excess body weight. The Roux-en-Y Gastric Bypass (RNY) Gastric Bypass Procedure Finally, patients who have undergone gastric bypass in the past can also have relief from complications and achieve further weight loss with revision surgery., Initial wt loss from RNY surgery will vary widely. There are many factors involved Did you lose a good amount of wt prior to surgery? If so, you initial wt loss may appear slow. Are you exercising? It helps the metabolism work better. Are you drinking enough water? Are you eating the foods suggested by your surgeon, or eating whatever you want? Etc. Those patients who attend regular support , This procedure has lower long-term risk and better average weight loss than the gastric bypass but has risk of malabsorption and chronic diarrhea. Patients who move forward with the gastric bypass, or SADI, commit to daily vitamin supplementation and yearly blood work to make sure vitamin levels remain within normal limits..