I have IBS w/C.
I have been taking citrucel with a fabulous product that everyone should try. Its called Super Seed from Garden of Life. Its more of an "alive" fiber from greens etc vs citrucel. I combine the two together twice a day and take my zelnorm. It seems to help
What is fabulous is Primal Defense. All it is is acidophilous. You can never have too much. I take 5 peoples a day and at times my stomach is at peace. Until I introduced Primal Defense I never had it like this. Then adding the super seed helped a lot.
In addition, everytime I take my vitamins I drink prune juice. Twice a day.
All this has made a difference.