I was lucky enough to receive my VSG surgery through the Veterans Administration. In order to qualify for the surgery I had to prove I could take weight off and maintain the loss for almost 3 months. Had the surgery on April 6th and have lost close to 30 pounds so far. Some people experience upper G.I. pain similar to acid ref. I tried several over-the-counter antacids. However, when they didn't work, my doctor told me he feels it was more of a spasm causing the discomfort. By eating slower .... really small bites .... sipping, not swallowing liquids in large gulps .... staying away from carbonated drinks (a no no), caffeine beverages (another no no) and eating creamed soups (no chunks), I've been able to pretty much control the discomfort. Another way to avoid the g.i. pain is to sit or stand and walk as much as possible rather than lay down. Before you "buy" anything, you really should write down all those questions/concerns for your doctor. Although there is a wealth of information in this forum, none of us are professionals. With regard to protein.... I hated the protein powder and switched to Slimfast (1-2 ounces) .... high protein with very low sugar and calories. I wish you the best of luck in reaching your goal.