Toothpastes containing activated charcoal that are supposed to whiten teeth are a “marketing ploy,” according to a publication in the British Dental Journal. Researchers have found that black toothpaste offers no proven benefits and actually increases the risk of tooth decay and discoloration. The study stands in stark contrast to marketing that claims charcoal toothpaste has oral health and antibacterial benefits, among other benefits.
Using charcoal to clean teeth is not a new concept. The ancient Greeks first used charcoal to remove tooth stains and get rid of odors from unhealthy gums. Activated charcoal has become very popular and heavily promoted as a means of removing tooth discoloration in recent years.
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A detailed review by King's College London and the University of Manchester entitled “Charcoal-containing dentifrices” now summarizes the results of 15 previous studies. The researchers concluded thatCharcoal-based dental productsdepend too heavily on marketing and evidence of their positive impact is lacking in most cases.
Dr. Joseph Greenwall-Cohen, co-author of the current study, warns that black toothpastenot a miracle cureand involves real risks.
Toothpaste should contain 1,350 to 1,500 ppm fluoride to protect teeth from tooth decay. Many toothpaste products made from charcoaldo not contain fluoride. Therefore, users are at higher risk of developing tooth decay.
Dr. Nigel Carter explained that some charcoal-based toothpastes can be "overly abrasive" and wear away tooth enamel, leading to sensitive teeth.
In addition to Dr. Carter describes Dr. Greenwall-Cohen discusses the risks of regular use of charcoal toothpaste, particularly for people with dental fillings. “Charcoal particles can also get caught in and irritate gums,” he explained.
“So don’t believe the hype. Anyone who is concerned about discoloration or discolored teeth that cannot be helped by dietary changes or improvements in oral hygiene should contact their dentist.”
