Agreed! I actually have plenty of fat while following PPLP and my regularity is great. I enjoy fiber filled foods just for what they are and not because they have fiber, though getting to subtract those carbs and how filling they are is a bonus!

My fat intake relates more to satiety for me, but if it also allows helps me stay regular, even better! If I did have issues "going" in the future, I'd be much more inclined to try some of the other suggestions out there in addition to upping the fat intake (I think magnesium and milk thistle were among the ideas). But I wouldn't reach for the fiber and flax anymore...at least not for that reason.