Here is my experience with the book Fiber Menace: I was drinking sooooo much water, eating super high fiber and still having trouble going to the bathroom (I am C if anything) and also having a lot of digestive pain and bloating. Somehow I discovered this book (maybe it was a search on amazon for something to help me) and I ordered it. The author talks about NOT drinking an excessive amount of water OR talking fiber supplements OR eating a high fiber diet. I thought I had nothing to lose so I cut back on the fiber, the water and stopped the Citrucel cold turkey and experienced better health almost immediately. If you google Fiber Menace it will take you to the author's site and a lot of the information is right there for you to read.
To date I have experienced relief is so many ways with that change and continue to not overdo water and fiber but I still lean too far to the low-carb side and shortchange myself in the SF department. I tend to eat too low carb for my activity level, meat makes me feel awful and creates C and I am not much of a lover of anything starchy (can't stand pasta, bread only slightly, potatoes-no way! Oatmeal causes bloating, cereal too rough on my system) so I am on these boards trying to learn from others and strike a healthy balance. I love veggies but am not a lover of fruit. And no, I wasn't a picky eater as a kid - I just know what makes me feel good and what does not (tee hee!)
Hope this helps. I love these boards for the help they give !