Slb, have you tried Caltrate Plus? A lot of people are having great success with it. I tried it myself, without success, so I switched to just plain Calcium with Vit. D. Some people are sensitive to the magnesium in the Caltrate. I have found that by having a bowl of oatmeal every morning and taking 1 Calcium at breakfast and one Calcium at supper, it keeps my IBS-D in check. I still take 2 imodium before I go out, more for peace of mind than anything. I hope you find something that works for you. There are so many helpful, caring people on this board.If you do a search on Caltrate, you will find numerous success stories.GrannyP.S. I noticed in your profile that you live fairly close to me.