I've actually injected myself with technical grade products (specifically IGF-LR3) without issue, and it was never a concern in my mind. If you're thinking of transdermal use of MgCl/MgCl6H2O then it's even less of an issue as the skin does a fine job of being a pre-filter before the immune system gets called into action. If you're looking for something like Magnesium salt flakes that might be used for a soak in the bath, then they're most likely commercial grade.
Paul Thank you Steve:) I've been looking for Magnesium Chloride so I can make it up by the half gallon or gallon, and all the 'grade' terminology is a little confusing. I know pharmaceutical grade and food grade are ok for consumption, and I figured lab grade would have to be mostly pure, but I wasn't sure that technical grade wasn't just another name for lab grade, and what do they use technical grade for anyway? I just don't want to use the wrong thing. :/ Annie
