I have dealt with this problem for over 25 years trying all kinds of stuff – from prescription drugs (harmful to liver) to calcium and lots in between. Amazing I started eating a banana first thing in the am and the problem with diarrhea has ended. I have pushed the envelope, so to speak, by drinking coffee just a few minutes later and still no problem. I am very amazed. The only other supplement I take is a bile salt pill when I eat a heavy meal. I have been doing this for about two weeks. Still a long way to go to be sure but I wanted to pass this along to all to try.