There is nothing magical about coral calcium. I forget the guys name that hawked this stuff of TV, but he is a fraud and you can read all about him on the internet. Just search of coral calcium and you will find out all about him and the hype. I don't know that taking it should make you feel worse, but unless you had a calcium-deficient diet, it probably won't make you feel better. Stick with the generic stuff if you feel you need to take a supplement.