The Future of Hair Extensions: How Safe Are “Lab-Grown” Hair Fibres?

In the fast-evolving world of hair extensions and wigs, safety, sustainability, and transparency are becoming increasingly important. A recent feature in The Business of Fashion highlighted how British brand Ruka is pioneering a new approach with its “lab-grown” or “bio-engineered” hair fibre — raising critical questions about what safer innovation in this space really looks like.

As advocates for consumer protection and ethical beauty standards, it’s essential for the Safety in Beauty community to examine such developments not only through the lens of innovation but also through the principles of safety, compliance, and informed choice.

Why This Innovation Matters

Consumers — particularly within communities that rely on hair extensions, wigs, and braiding — are becoming increasingly aware of the ethical, environmental, and health risks associated with hair products.

Traditional hair extensions come from two main sources: synthetic fibres or human hair (often procured through complex global supply chains that raise ethical questions). Both routes carry potential risks.

Synthetic fibres can emit harmful compounds when heated during styling.
Human hair can be contaminated with chemical treatments or sourced through unethical labour practices.
Most importantly, current regulatory frameworks don’t always classify these materials as cosmetics or textiles, leaving them outside the usual safety testing regimes.

This creates a significant safety gap in an industry that is in direct contact with the human scalp and skin.

What Ruka Is Doing Differently

According to The Business of Fashion, Ruka’s new fibre — called Synths 2 — is composed of collagen protein, rather than conventional plastics. The brand claims several key advantages:

It is biodegradable, hypoallergenic, and dyeable.
When heat-tested in collaboration with University of Manchester and University of Newcastle, the fibre released 98 % water vapour, compared to harmful emissions like phenol, toluene, and benzene found in some plant-based synthetics.
The brand has published a transparency report titled The Synth Shift, which calls for open industry discussion about fibre safety and ethical production.

These steps position Ruka as part of a new wave of innovation focused on safety-driven design in beauty materials.

Key Safety and Regulatory Considerations

For professionals and practitioners, the emergence of collagen-based or lab-grown fibres prompts a series of important questions:

Regulatory Classification:
Are these fibres categorised as cosmetics, textiles, or something else? Many products currently fall into regulatory loopholes.
Testing and Certification:
Has the material undergone independent toxicology testing for allergens, solvents, or chemical residues?
Material Traceability:
What is the source of the collagen or biopolymer? Is the entire production process traceable and transparent?
Real-World Performance:
How does the fibre behave under prolonged wear, heat, dyeing, and exposure to styling chemicals?
Consumer Education:
Do users understand the meaning of terms like “lab-grown” or “bio-engineered”? Are marketing claims balanced and factual?
Professional Responsibility:
Salons and clinics offering these new materials must review vendor safety data sheets (SDS) and ensure compatibility with existing chemical products and procedures.

Practical Implications for Clinics and Salons

For aesthetic practitioners and hair professionals, new materials mean new protocols. Before introducing “lab-grown” fibres:

Review safety documentation from manufacturers and request supporting test data.
Conduct patch testing for clients with sensitive scalps or skin conditions.
Update consent and aftercare forms to reflect the use of new, non-traditional materials.
Educate clients about care, maintenance, and limitations of innovative fibres.
Collaborate with safety consultants or organisations like Safety in Beauty to ensure best practice adoption.

In post-surgical or medical hair loss settings, where the scalp may be compromised, due diligence around fibre safety becomes even more crucial.

Challenges and Cautions

While the early results are promising, the Business of Fashion article also notes several challenges:

Cost: Lab-grown fibres are more expensive due to complex production.
Availability: Scaling to meet industry demand remains difficult.
Terminology: Marketing terms like “lab-grown” or “next-gen” may confuse consumers.
Research Gaps: Independent, peer-reviewed studies are still limited.
Salon Conditions: Safety may differ under heat or chemical exposure, requiring real-world validation.

Innovation should never outpace safety. Until these products are thoroughly assessed across diverse consumer groups and salon environments, professionals should remain cautiously optimistic.

The Safety in Beauty Perspective

The advent of “lab-grown” hair is an exciting step forward — merging sustainability, science, and style. Yet, as with any beauty innovation, safety must remain central.

At Safety in Beauty, we advocate for a proactive approach:

Demand scientific transparency from manufacturers.
Insist on evidence-based safety testing.
Educate professionals and clients on the potential risks and benefits.
Encourage industry-wide dialogue on standards for non-traditional materials.

The introduction of Ruka’s “Synths 2” fibre opens the door to safer, more ethical beauty — but it also calls on us, as a community, to scrutinise claims, verify data, and champion consumer protection at every stage.

References & Citations

Chesters, L. (2025). Is Lab-Grown Hair the Future of Beauty? The Business of Fashion. Retrieved from https://www.businessoffashion.com/articles/beauty/lab-grown-hair-safety-ruka/
Ruka Hair. (2025). The Synth Shift: A Report on the Future of Fibre Safety. Ruka Official Website.
University of Manchester & University of Newcastle (2025). Collaborative testing data referenced in The Business of Fashion article on fibre emissions and safety.