Charcoal toothpaste is made from something called activated charcoal, which is a treated form of carbon. The treating process makes the carbon porous. It’s these pores that are reasonable for the claim that charcoal toothpaste can whiten teeth. Essentially, it’s believed that these pores can pull stains, tartar, and bacteria away from teeth. Activated charcoal has been used as a trusted medical treatment.
How does charcoal toothpaste whiten teeth? We’re happy to report that charcoal toothpaste can effectively remove surface stains on teeth, allowing them to take on a brighter, whiter appearance. However, if your tooth discoloration is below the surface, you may not see a difference after using charcoal toothpaste. Additionally, the American Dental Association (ADA) has a few warnings about the stuff. Since charcoal toothpaste isn’t only porous but also pretty abrasive it can be damaging to teeth. Regularly brushing your teeth with a highly abrasive toothpaste can wear away tooth enamel and leave your teeth at risk for cavity-causing bacteria. A thinner enamel may also mean a duller discolored smile.
Why Charcoal Toothpaste? Using charcoal as a teeth-cleaning method is nothing new. The last decade has seen a reemergence of charcoal-based toothpastes with claims of whitening, antibacterial, antiviral, antifungal and breath freshening properties, according to an article published in the Journal of the American Dental Association (JADA). After reviewing a number of studies, the researchers concluded that more evidence is needed before they can confidently establish the safety and effectiveness of charcoal pastes.
How to Whiten Teeth With Activated Charcoal 
- First, obtain activated charcoal (not regular) that will be safe for you to brush your teeth with to get them white. Then, get a special toothbrush that is just for your charcoal brushing.
- Mix the powder with some water to make a paste, and put the paste on the brush. Then, brush the paste on your teeth for a few minutes (typically just two or three). Now comes a very important part, spit out the charcoal carefully.
- You don’t want to get it all over your outfit or bathroom. Then, rinse out your mouth with water and spit it out. Repeat the rinse and spit steps several times until you do not see any more charcoal powder on your teeth, gums, or anywhere else in your mouth. Otherwise it might migrate back to your teeth making your smile look unappealing and black.