A surprising breakthrough from King’s College London suggests that toothpaste made with proteins from human hair could help repair teeth and even prevent early tooth loss.
Researchers have found that keratin—a protein naturally found in hair, skin, and wool—can also play a crucial role in protecting teeth. Already used in shampoos and beauty products, keratin may soon find its way into toothpaste as a key ingredient for dental health.
Dr. Sherif Al-Sharkawi from King’s College London called the discovery a “game changer,” noting that keratin-based products could revolutionize oral care. “If you have a microcrack or a very small defect in your tooth, it will heal on its own without you even realizing it,” he explained.
Enamel repair where it matters most
Enamel, the outer layer of the tooth, does not naturally regenerate once damaged. Many common dental issues—from sensitivity to cavities—begin with weakened enamel.
The study found that when keratin interacts with minerals in saliva, it forms a protective coating that mimics the structure of natural enamel, potentially repairing tiny defects before they worsen.
This innovative approach could pave the way for a new generation of toothpaste that not only protects teeth but actively repairs them. While further testing is needed before keratin toothpaste hits the market, scientists believe this could be a turning point in preventive dentistry.
