Wool keratin breakthrough for bone repair

April 27, 2026

Scientists have developed an innovative, eco-friendly biomaterial derived from wool that could transform the future of bone repair. A research team at King’s College London has demonstrated that keratin, a structural protein extracted from wool, can effectively stimulate bone regeneration in living organisms.

Breakthrough in sustainable bone healing

In preclinical studies, researchers tested wool-derived keratin in animal models and observed its ability to promote new bone growth across damaged areas. The regenerated tissue closely resembled natural, healthy bone—potentially outperforming current leading materials used in regenerative medicine.

Dr. Sherif Elsharkawy from the Faculty of Dentistry, Oral & Craniofacial Sciences highlighted the importance of this advancement, noting that this is the first successful use of a wool-based biomaterial in a living system for bone repair.

Why wool-based keratin matters

Keratin sourced from wool offers a strong sustainability advantage. Wool is renewable, widely available, and often discarded as agricultural waste. This makes it a cost-effective and scalable option for medical applications compared to traditional materials.

Limitations of current gold standard: collagen

For decades, collagen has been the primary scaffold used in bone regeneration and dental procedures. It acts as a barrier to protect healing areas while allowing bone tissue to regrow. However, collagen has several drawbacks:

• It lacks sufficient mechanical strength for load-bearing applications

• It degrades too quickly in some cases

• Its extraction process can be costly and complex

These limitations have driven the search for stronger, more durable alternatives like keratin.

Lab and animal testing results

Researchers engineered keratin into stable membrane scaffolds through chemical processing. These membranes were tested on human bone cells in laboratory conditions, where they supported strong cell growth and clear indicators of bone formation.

The team then implanted the keratin membranes into rats with critical skull defects—injuries that would not heal on their own. Over time, the material successfully guided bone regeneration in these damaged areas.

Stronger, more natural bone structure

While collagen-based materials produced a larger volume of bone, keratin scaffolds resulted in higher-quality tissue. The newly formed bone was:

• More organized

• Structurally stronger

• Better aligned with natural bone architecture

Additionally, the keratin membranes integrated seamlessly with surrounding tissue and remained stable throughout the healing process—key factors for clinical success.

A promising future for regenerative medicine

This breakthrough positions keratin as a next-generation biomaterial that could reduce reliance on collagen and improve outcomes in bone repair treatments. By combining sustainability with superior structural performance, wool-derived keratin may soon play a major role in medical and dental regeneration therapies.