I have IBS-C. I began treating with the diet, zelnorm, and acacia (2 tbls twice a day, decrease to 1 tbs twice after stable). I quit Zelnorm after one month of feeling stable. Don't like taking drugs indefinitely. Went without, than tried Digestive Advantage, not helping with stomach pain, but constipation is gone for the most part. Just starting acidolpholous actually for a yeast infection, but read about it working well for IBS, hopefully. The fiber has really seemed to help the constipation, although the stomach pain has not subsided for the past week and a half. That is the worst part. I don't think the Digestive advantage is a keeper. I have been taking Magnesium and Flax oil but sometimes I wonder if that makes my stomach worse. I forgot to take for a few days and my stomach pain subsided. UGhhh!