I agree with artist. Insoluable fiber on an empty or nearly empty tummy spells d-i-s-a-s-t-e-r for IBSers. Check out www.eatingforibs.com. It's really worked for me.Soluable fiber on an empty tummy and with meals. I take FiberCon every day (2 tabs, 4x/day) with a lot of fennel tea and water, and I feel better than I have in months!