I have had IBS with prominent diarrhea for many years now. Have been using this for 2 weeks now and have become a huge fan already. It has greatly relieved my symptoms. I would however caution against using this with other fiber products such as All-Bran plus. I used to drink a shake every morning which I made using All-bran plus as a base. Using both gave me extreme flatulence for a few hours a day. Since I was not planning on giving up using psyllium, I quit with the shake and have had no problems since then. I highly recommend this product for anyone with IBS. It has greatly changed my life.