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Saturday, March 1, 2025

Ask the Dentist: Is charcoal toothpaste a whitening hack or a risky trend?

 



Charcoal toothpaste has gained popularity for its promise of a whiter smile. Made with activated charcoal, it is believed to absorb stains and plaque, helping to brighten teeth. However, is it truly safe?

Activated charcoal is a porous substance used in various products. Charcoal toothpaste works by scrubbing away surface stains. The American Dental Association (ADA) states that there is insufficient evidence to prove its safety or effectiveness in whitening teeth.

Charcoal toothpaste can be abrasive. It removes stains by wearing away the outer enamel — a process that can cause long-term damage.

Risks of Charcoal Toothpaste


While it may temporarily whiten teeth, charcoal toothpaste comes with significant risks:

  • Abrasiveness – It can wear down enamel, leading to sensitivity and a higher risk of cavities. Note that enamel loss is irreversible.
  • Lack of fluoride protection – Most charcoal toothpastes do not contain fluoride, which is essential for cavity prevention and enamel protection.
  • Gum irritation – The rough texture can cause gum inflammation, bleeding, and even recession.
  • Stains on restorations – Crowns, veneers, and fillings may absorb charcoal particles, causing discolouration over time.
Due to these risks, charcoal toothpaste is not recommended for daily use. Safer alternatives include:
  • Professional whitening – Consult your dentist for safe and effective whitening treatments.
  • Regular cleanings – Routine dental check-ups help maintain a bright smile without damaging enamel.
Before trying new dental products, consult your dentist to ensure it's safe for your oral health.

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Dr Steven Soo is a Dental Specialist in Prosthodontics with Specialist Dental Group®. He was formerly a Clinical Lecturer at the Eastman Dental Institute  and Clinical Teacher at the GKT Dental Institute, both of which are affiliated  with the University of London. Dr Soo has a special interest in prosthetic and  implant restorative dentistry. He also enjoys seeing children.
www.specialistdentalgroup.com | (65) 6733 7883 






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