We have had a lot of people ask us about this. The following article published on the ADA website says it all:
Charcoal toothpastes: The more you know, the less you may want to use it
19 August 2019
Charcoal is everywhere these days.
The compound has a long history of use, with its use intra-orally stemming from the capacity of roughly ground charcoal to abrade away stains and deposits on teeth and absorb noxious substances. These days, you will find charcoal in dental products, beauty products and even foods, such as