I'll tell you this story. In one of my 40 dayers I figured I'd turn the last 7 days into a colon clenase so I decided to add Oxy powder which my guess is just a "brand" variation and probably the same as OxyMag since the OP is postly magnesium. Things seemed doing well as I was expelling some pretty nasty black butt pee. At the end on the 7 days I developed the mother of all hemorhoids where I could hardly even walk and I'm not someone prone to hemorhoids at all.