There were a couple of people who had sleeve, a few who were Bypass.All have said the are now vomiting almost daily since the procedures. One has quoted Dr. Nowzarden from 600lb Life as saying no one with CVS should ever undergo gastric surgery where they are cutting the stomach organ. This is hearsay, but I am thinking I need to do more research and pass up the surgery date for the immediate future.Since i can't find any clinical research, and the only people who have actual real life experience are the patients themselves, I am afraid to take a chance unless someone knowledgeable about CVS can say otherwise. I was just hoping for some positive experiences, but I don't think there are too many CVSers who are obese. Most are underweight.