You would have to be living under a rock if you haven;t heard, or read, about all the hype surrounding charcoal; as the latest go-to weapon for whitening teeth. Funny enough, some dentists feel the stuff actually works . . . but they add a caveat as the end. It may harm the enamel on your teeth, and once you start wearing away the enamel on your teeth, you can prepare yourself for some gnarly dental work headed your way.
Here;s the whole story: http://q13fox.com/2017/10/26/healthy-living-dentist-warns-about-charcoal-teeth-whitening-products/