I am 51 and have osteoporosis. My doctor wants me to take Micalcin (a prescription) and also take 1500 units of calcium and 400 units of Vitamin D. I am so afraid that all of this will make my IBS-C worse than it already is! I can't get much calcium in my diet because I can't eat any dairy or brocolli or leafy greens. Those foods make my IBS worse. Does anyone have any experience with Micalcin? Does anyone find that calcium supplements make their constipation worse? Thanks for any help I can get!PS to Ghitta: If you ever write a book, I will stand in line to buy it. You have been of great help to me through your postings!