I had gastric bypass 2 years ago - I have lost 106 pounds. My Dr. stresses Protein Shakes and Bariatric Vitamins, but I have a problem with the shakes, as a result my hair is thinning. The Protein Shakes were great before the surgery, but after, not so good... I try to eat as much meat as I can, and things like peanut butter, beans and any high protein things that I can. Milk, cottage cheese, cheeses of all kinds and the like. Good luck!