Hey Linda,I want to tell you that I've been on Calcium Caltrate for 2 weeks now and I've noticed that my stools have been much firmer and noticeably my life has been much better. However all good things come to an end, I came home from the gym and had to go to the bathroom and I would classify it as having "D"I was so excited because I was doing so well. I did have some fried food tonight but I had the same meal over the weekend and felt fine. Can calcium stop working? I'm really upset because I was loving the fact of going to the bathroom like a normal person. Please write back with any info or feedback.