Our practitioner uses ARL for tests, but Standard Process for supplements. But,, from what I understand, all copper has inherently in it this binding protein called ceruplasm or something like that. So it won't be listed as a seperate ingredient on your supplement. It allows the body to eliminate the copper.The copper stored in your body is biounavailable so by taking more copper, which has the binding protein to eliminate it, you are assisting your body to detox the copper that is stored away in unusable places. Not sure if that's totally right, but that's what I got out of ARL's article about copper.