Re:Replacing Epsom Salts with magnesium oxide?

I am still planning my very first liver flush. Has anyone ever tried to replace Epsom Salts with magnesium oxide? What were the results? I read someplace that any form of magnesium should do the trick of opening up the ducts so stones can pass through easier. Also, I still have some magnesium oxide left over from doing Hulda Clark 's kidney cleanse.