I fear that I am bringing up a topic that has been visited many times before. I do apologize. I have read all of the threads, but now I am really confused! I have MS and extreme constipation. Fiber, flax-seed oil and lots of fruits and vegetables have not helped. My neurologist suggested Magnesium, but I now realize that there are many different forms. I purchased Magnesium Oxide and it has not helped. After reading the posts, I believe that Magnesium Oxide was not the correct type. Which form of Magnesium would be most beneficial to treat constipation, and how much per day? Thank you...