You’ve likely watched a few videos about teeth whitening with charcoal. You might be amazed at the before and after results you’ve seen spread across social media. Although it appears to be the ideal DIY method to resolve stains and discoloration at home, is charcoal bad for your teeth? It may not be as safe as you’ve been led to believe. Here’s what you need to know about the risks of combating tooth discoloration using charcoal.