It is a combination of glucaric acid with calcium,and it is very good for one's health. In reality you can get it fromfoods, so with a proper diet there is no need to be supplementingwith it. However, if you want still to supplement with it, better usea more universal supplement that will have both the calciumd-glucarate, and other stuff in it. It does not make much sense touse lots of supplements when you can get it all in one. I like forthat purpose the N2Guard.