Activated charcoal is a fine-grained powder made from wood, coconut shells, and other natural substances oxidized under extreme heat. Its main property is high abrasiveness.

A thorough review in the British Dental Journal (2019) found that charcoal offers little protection against tooth decay and there’s limited scientific evidence to support its other health claims. In fact, powdered charcoal in toothpaste can be harmful—it strips away tooth enamel, lightening the tooth’s visible color but also increasing sensitivity and risk of staining over time. If you use charcoal toothpaste, you must brush very gently to avoid wearing down the enamel surface.

Additional findings shared by the BBC highlight that overuse of charcoal toothpaste in patients with fillings allows particles to infiltrate and darken them, as well as accumulate in the gums and irritate them. Most charcoal-infused and “natural” toothpastes do not contain fluoride, which is essential for cavity prevention.

Key summary:

• Charcoal toothpaste is too abrasive for daily use.

• Most charcoal brands lack fluoride.

• It may aggravate staining on teeth.

• Charcoal can negatively affect dental restorations, such as fillings.

If you want to know more about whitening your teeth or selecting a whitening toothpaste, please make an appointment with Dr. Kaufman to explore the safest and most effective options for your smile.