I had the same reaction - constipation and bloating.

It seems there are few different genetic types of people who have entirely different, even opposite, reactions to many of these supplements. A lesson here is to buy minimum quantity of a new supplement and experiment very slowly and carefully before plunging into every advice being posted. I have now 3 bottles of Algin (that was their discount threshold) which I probably won't be able to use. I might give them to my mother in law. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />