I'm just wondering if anybody has this pattern. I am C and tried taking fibre and mag supplements daily, and when they worked, I was fine...but if they didn't produce a BM, I was in far worse agaony than I would have been if I didn't take anything. This was the case if I only took mag or only the fibre. Its as if you need a greater volume of stuff in their to trigger the persitalsis, but if it doesn't happen, that volume just causes pain. I'm now thinking about just giving up supplements. Sometimes I think my IBS was better when I didn't do anything for it.