In a new study published by King’s College London, scientists discovered that keratin, a protein found in hair, skin and wool, can repair tooth enamel by creating a protective coating and stopping the early stages of decay.
“Unlike bone and hair, tooth enamel does not regenerate; once it is lost, it is gone forever,” said a senior member of the research team. “Acidic foods and drinks, poor oral hygiene and ageing all contribute to enamel erosion and decay, leading to tooth sensitivity, pain and ultimately tooth loss.”
Fluoride toothpastes are currently used to slow this process, but this research shows that keratin-based treatments stop it completely. Keratin forms a dense mineral layer that protects the tooth and blocks nerve channels exposed to sensitivity, providing both structural and symptomatic relief.
The treatment could be delivered via toothpaste for daily use or as a professional gel, similar to nail polish, for more targeted repair. The team is currently exploring avenues for clinical application and believe that keratin-based enamel regeneration could be a viable option for patients with sensitive teeth. It will be available to the public in the next two to three years.
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