Scientists turn sheep wool into a bone-healing material in a major medical breakthrough

Researchers at King’s College London have created a bone-healing material using sheep wool, offering a potential sustainable alternative to collagen in regenerative medicine. The study focused on keratin, a protein found in wool, hair, and nails, which was chemically processed into thin membranes to support bone regeneration. In laboratory tests with human bone cells, the keratin scaffolds demonstrated successful cell attachment and healthy bone development. Animal testing involved implanting the keratin membranes into rats with skull defects too large to heal naturally. While collagen scaffolds generated more overall bone, the keratin-based material produced tissue more closely resembling natural bone in structure and stability. The fibers formed by the keratin scaffolds were better aligned, and the material integrated well with surrounding tissue, remaining stable throughout healing. Dr. Sherif Elsharkawy, from King’s College London’s Faculty of Dentistry, called the findings the first successful demonstration of a wool-based material repairing bone in a living animal. He suggested keratin could challenge collagen’s dominance in regenerative biomaterials, particularly for weight-bearing or high-pressure applications where collagen’s mechanical strength is insufficient. The research also highlights environmental benefits, as sheep wool is renewable and often discarded as agricultural waste. Scientists believe keratin-derived biomaterials could provide a scalable, sustainable source for future medical use, though further human testing is required before clinical application. The study marks an early but significant step toward developing stronger, more stable biomaterials for bone repair and dental reconstruction. While promising, the technology remains in preliminary stages, with additional safety and efficacy tests needed before potential use in patients.