More on the 2 forms of EDTA

I found this on the site of a co SELLING the magnesium version, and not elsewhere yet, with no studies, so I'm suspicious of it. But thought I'd post it anyway. This could be important for those seeking to remove calcium deposits via EDTA chelation:
"There are two forms of EDTA currently available for chelation, those with calcium already attached to the EDTA molecule, and those without... Only calcium-free EDTA can remove (harmful deposits of) calcium from the tissue and arteries"