Poor oral hygiene: Not brushing and flossing regularly can lead to plaque buildup, which can stain teeth. Charcoal is a fine black powder, derived from natural sources such as wood, coconut shells ...

Charcoal-based toothpastes, which claim to whiten teeth, are a "marketing gimmick ... the authors say. Excessive brushing with them can do more harm than good, they add. They advise people ...

"DO NOT use those black charcoal whiteners ... u/zookeepers-dentist 4."Do not brush your teeth for at least one hour after vomiting. [Instead,] rinse with water using 1 tsp of baking soda mixed ...

But dental products with charcoal are a different story. They may give you a whiter grin at first. But over time, they can wear down your teeth's hard outer shell-- enamel. That can make your ...