Mark Sircus is good. I am on his email list. I use DMSO a lot mixed with Epsom salts instead of magnesium chloride which I do have on hand.
All pure DMSO should be mixed with 25% pure or distilled water before applying. DMSO draws water from your tissues so a slight problem there.
I purchased the Mag Bicarb and it is all it says it is!!
The FIRST day I drank it my pains went away and have not been back!