Most J-pouchers have normal (or nearly normal) digestion and absorption. We don’t have normal elimination of stool, and some folks do have a problem with fibrous veggies. Some J-pouchers also have an additional problem with absorption, but that generally isn’t because of their J-pouch. The fact that some other folks have a problem with veggies is a terrible reason to stay away from them. Certainly if you find that a particular food (or kind of food) gives you trouble then by all means avoid it or adjust the amount you consume, but other people’s experiences with food tell you almost nothing about what your experience will be.