Perhaps you are right. Who knows? But considering that my Dr. has performed over 8,OOO of these procedures, at this point, hard as it may be, thinking gonna go with go with his opinion. My registered dietitian preaches the same thing. I will be avoiding carbonation. I believe you can regain the weight. Look at Al Roker, Carnie Wilson. While they were both bypass, they did in fact gain the weight back. I know someone else who is over half way back. The surgery is not magic. You have to put the work into it and follow your Doc's advice.