Hair protein toothpaste could repair enamel, stop tooth decay

Researchers at King’s College London have developed a novel keratin-based toothpaste derived from human hair protein that could repair tooth enamel, reduce sensitivity, and prevent decay. Unlike enamel, which cannot regenerate naturally, keratin forms a protective, enamel-like coating by interacting with minerals in saliva, creating a dense mineral layer that halts decay and seals exposed nerve channels. This biomimetic approach offers both structural protection and symptomatic relief, potentially reducing the need for fillings or crowns in early-stage tooth damage. The keratin used in the toothpaste is sustainably sourced from biological waste such as hair and wool, providing an eco-friendly alternative to traditional toxic plastic resins used in restorative dentistry. The protein forms a crystal-like scaffold on the tooth surface that attracts calcium and phosphate ions, gradually rebuilding enamel with a natural color match that improves aesthetics and patient satisfaction. The researchers anticipate that keratin-based enamel regeneration products could be available within two to three years, delivered either as daily toothpaste or professionally applied gels, marking a significant advancement in