Researchers at King’s College London have discovered that keratin—a protein found in hair, skin, and wool—can effectively repair tooth enamel and halt early decay by forming a protective coating that mimics natural enamel structure when it interacts with minerals in saliva. While tooth enamel cannot naturally regenerate and is vulnerable to erosion from acidic foods, poor hygiene, and aging, keratin-based treatments were found to completely stop the decay process by creating a dense mineral layer that protects teeth and seals exposed nerve channels.
The treatment, which could be delivered through daily toothpaste or a professionally applied gel, represents a significant advancement in regenerative dentistry and may be available to the public within two to three years. Beyond its therapeutic benefits, keratin offers an eco-friendly alternative to traditional plastic resins used in dental care, as it can be sustainably sourced from biological waste materials like hair and wool while providing a more natural appearance. This breakthrough aligns with growing concerns about healthcare sustainability and positions keratin as a transformative solution that restores biological function using the body’s own materials.