Skin Conditioning

Glyoxyloyl Keratin Amino Acids

INCI: GLYOXYLOYL KERATIN AMINO ACIDS

Reviewed by Rosie · Last updated 2 Jun 2026

A keratin derivative designed to condition and support hair fibre structure

Best For Skin Types

All

Usage Frequency

As directed by product instructions

What Is Glyoxyloyl Keratin Amino Acids?

Glyoxyloyl keratin amino acids are a modified form of keratin, the structural protein naturally found in hair. The ingredient is created by chemically processing keratin to introduce glyoxal groups, which allows it to bond more effectively with the hair shaft.

In haircare formulations, this ingredient functions primarily as a conditioning agent and antistatic. It is occasionally incorporated into skincare products, though its primary applications are in hair treatments, styling products, and colour-treated hair care ranges.

How It Works

The glyoxal modification allows the ingredient to form covalent bonds with the keratin proteins in hair, creating a more durable conditioning layer than unmodified keratin. This cross-linking effect helps to reinforce weakened hair fibre and reduce static electricity by improving the hair surface's smoothness.

When used in skincare, the mechanism is less well-defined, as skin does not contain keratin in the same way hair does. Any benefits would likely be limited to surface conditioning and moisturisation rather than structural change.

Clinical Evidence & References

Evidence specific to glyoxyloyl keratin amino acids in skincare is limited. Research has primarily focused on its use in haircare, where it has demonstrated effectiveness as a conditioning agent for chemically treated or damaged hair.

In skincare contexts, published clinical data is sparse. The ingredient's safety profile appears acceptable based on cosmetic industry use, but skincare-specific efficacy studies would be needed to substantiate claims beyond general moisturisation and smoothing effects.

How to Use

If used in a skincare product, apply to clean skin as directed by the formulation. Concentrations and application frequency will vary depending on the product type and the other actives present. For hair products containing this ingredient, apply to damp hair and distribute evenly before rinsing or styling as instructed.

Safety & Precautions

Glyoxyloyl keratin amino acids are generally well-tolerated in cosmetic formulations. There are no widely reported safety concerns at typical use levels, though patch testing is advisable for those with known protein sensitivities.

Frequently Asked Questions

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