Colloidal silver is a popular alt med remedy for lots that ails ya, most commonly touted for infections.
There is risk of a mildly unpleasant side effect, as this guy found out:
http://cosmos.bcst.yahoo.com/up/player/popup/?rn=3906861&cl=5573716&ch=4226726&src=news
By the way, I don’t recommend doing a Google image search for argyria.