I think you tend to get what you pay for when it comes to this sort of thing. Remember your teeth and gums are conduits into your internal self, so do you really want to use harsh chemicals/bleaches that may have far reaching consequences once inside you?
As a not-totally-un-related aside, Beware of mercury in your fillings, nasty stuff when it gets inside you.
As a not-totally-un-related aside, Beware of mercury in your fillings, nasty stuff when it gets inside you.
