People looking for a whiter smile might reach for charcoal toothpaste, given its claims of being “natural” and its long history. But does charcoal toothpaste really whiten teeth? And does it do so safely?

The answer is mixed. While charcoal toothpaste can brighten your smile a little, it’s not the best whitening agent out there. Nor is it the safest option available, Dr. John Brooks, a clinical professor in the Department of Oncology and Diagnostic Sciences at the University of Maryland School of Dentistry, told Live Science. 



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