Originally Posted by LisaM

Did a lot of research on this... and pouch size two to three years post-op ranged between 8 and 12 ounces - so a cup to a cup and a half of fairly solid food. The research also was very clear that pouch size had no measurable effect on the overall percentage of body weight lost.

Gaining weight back tends to involve three things - drinking while eating (allowing you to eat more without feeling full as fast); grazing - eating more than three meals and a snack per day; and eating high-fat, high-carb, low-protein foods regularly. GBS post-ops who gain weight are often doing all three.