When I first took it I had bad stomach pains so we cut the dose in half until my system got used to it. I am now taking it as originally prescribed and feel okay but I can't say that it has helped the "C" yet. I just got my acacia in the mail yesterday but am sure hesitant to use it because Citrucel caused such bloating and awful gas and didn't help the "C" either. Taking Metamucil was even worse. Nothing seems to work for me. Magnesium supplements helped a little at first but then not at all. I drink lots of water and exercise three to five times a week.