Wool Keratin Regenerates Bone Better Than Collagen
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- King's College London researchers found that wool-derived keratin scaffolds regenerated bone in rats with skull defects too large to heal naturally, marking the first successful test of a wool-based material for bone repair in a living animal.
- Dr. Sherif Elsharkawy of King's Faculty of Dentistry, Oral & Craniofacial Sciences called the result a "major milestone" positioning keratin as a potential new class of regenerative biomaterial that could challenge collagen's long-standing dominance.
- Keratin scaffolds produced bone with better-aligned fibers and a closer structural resemblance to natural bone than collagen, even though collagen generated a greater total volume of new tissue.
- The keratin membranes stayed stable throughout healing and integrated smoothly with surrounding tissue, two traits the researchers flagged as critical for any future clinical application.
- Collagen, the current gold standard, is relatively weak, can degrade too quickly for bones that need to bear weight, and is costly to extract, the team noted.
- Wool is frequently discarded as agricultural waste, which the researchers frame as both a renewable and scalable source if the material moves toward clinical use.
Why it matters: Collagen has been the default scaffold in regenerative medicine and dentistry for decades despite known weaknesses, and the King's College result puts a waste-stream material on the table as a structurally superior alternative. The team emphasizes wool as a renewable, scalable supply chain, since it is often discarded as agricultural waste rather than used.
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