Scientists are using extracts from sheep's wool to regenerate bone tissue in living animals. Researchers at King’s College London have unlocked a highly sustainable breakthrough in regenerative medicine by turning ordinary sheep’s wool into advanced bone-healing scaffolds. The team extracted keratin, the tough structural protein that gives wool its strength, and developed it into thin, biomimetic membranes. In laboratory trials, these membranes successfully supported the growth of human bone cells. When tested in living animal models with severe, non-healing skull injuries, the wool-derived scaffolds guided the growth of new bone directly across the damaged areas, demonstrating the immense clinical potential of this abundant agricultural byproduct. What makes this discovery particularly remarkable is the quality of the regenerated tissue. While collagen has long been the gold-standard scaffold in orthopedics, it often suffers from poor structural strength and rapid degradation. The new wool-based keratin scaffolds, however, produced bone that was far more organized, stable, and structurally similar to healthy natural bone than tissue grown with conventional collagen. Because wool is a renewable resource often discarded as farming waste, this technology offers a scalable, eco-friendly, and cost-effective alternative that could soon challenge the long-standing medical reliance on expensive, animal-derived collagen. source: Gamea, S., Kaabi, H., Elredah, I., Aljohani, H., Horamee, S., Abu Shaqrah, H. J. N., Lu, E. M.-C., Hodgkinson, T., Balto, H., Sharpe, P. T., & Elsharkawy, S. (2026). Bone regeneration of rat calvarial defect using biomimetic keratin-based membranes. Biomaterials Advances, 184, 214806.