You have probably seen friends on social media talking about charcoal “whitening” toothpaste.
Charcoal toothpaste is not a new idea as it has been around since ancient Roman times. It was not a good idea then and is still not a good idea. Charcoal is way too abrasive to brush your teeth with. It would be like scrubbing your face with sandpaper…except the skin on your face grows back as opposed to your tooth enamel which does not grow back. Toothpaste abrasiveness is measurable as relative dentin abrasivity (RDA) and should not exceed 200. To avoid tooth sensitivity and gum recession use toothpaste that are safe and approved.
Moral of the story…keep the charcoal on your outdoor grill, not your teeth!