From experience, I know that this works for irritable bowel syndrome. I use 3 Caltrate (purple and white box because it does not have sugar or preservatives) calcium pills a day taken in A.M, around noon, and P.M. This calcium has very little magnesium in it (which aggravates IBS) and the calcium helps to dry up everything and stop the diarrhea. Try it and see if it works for you. Good luck.