Toothpastes with the gritty stuff are fashionable,but are they secure and effective to use?Charcoal seems to be the latest thing—for cleansing your face and purifying your insides—and even brushing your teeth. But before you start using a charcoal-based toothpaste, it’s best to realize that claims that it results in whiter and brighter teeth are unproven, and it may in fact be harmful. It’s not among the small number of whitening products that have received the American Dental organization Seal of Acceptance,given after scientific evaluations for safety and effectiveness.
Source: tufts.edu