Carole, I have taken it before and it seemed to help, but for me it helped more for d then c, but you can give it a shot. others on the bb have found it useful. You still should have other sources of fiber I believe however.Here is some info for you: http://www.gicare.com/pated/polycarbophil.htm ------------------ http://webpotential.com/ericibs/index.htm