Kathy, lettuce is one of the few if not only food I can still identify in the toilet. This didn't happen to me either long before I received my J Pouch. Compared to other foods I've digested it's very quick at speeding right through my system. That's not to say other foods don't trouble my pouch but many fruits and vegetables rank at the top of my list. Therefore, I can certainly understand why lettuce is included as "foods that may increase pouch output" on this link https://www.j-pouch.org/diet.html