Laurdimonium Hydroxypropyl Hydrolyzed Keratin
INCI: LAURDIMONIUM HYDROXYPROPYL HYDROLYZED KERATIN
Reviewed by Emma · Last updated 2 Jun 2026
A keratin-derived conditioning agent that helps smooth and strengthen hair and skin
Best For Skin Types
All, Dry, Combination
Addresses
Usage Frequency
Daily
What Is Laurdimonium Hydroxypropyl Hydrolyzed Keratin?
Laurdimonium hydroxypropyl hydrolyzed keratin is a positively charged polymer derived from keratin, a structural protein naturally found in hair and the outer layer of skin. The ingredient is created by breaking down keratin into smaller fragments and then chemically modifying it with lauryl and hydroxypropyl groups, which allow it to adhere to the surface of hair and skin.
In skincare and haircare formulations, this ingredient functions primarily as a conditioning agent. Its positive charge allows it to bind to negatively charged surfaces, forming a coating that can help improve texture and reduce static.
How It Works
The ingredient works through electrostatic attraction. Hair and skin surfaces carry a negative charge, while this modified keratin is positively charged. When applied, the ingredient deposits onto the skin or hair surface and bonds electrostatically, creating a thin, conditioning film.
This coating can help temporarily improve hydration levels at the surface and reduce the appearance of roughness or irregularity. The effect is largely cosmetic and temporary, washing away with cleansing.
Clinical Evidence & References
Research on this specific ingredient in skincare is limited. Most evidence for hydrolyzed keratin and its derivatives comes from haircare studies, where it has demonstrated conditioning benefits including improved texture, shine, and reduced breakage.
In skincare, the conditioning properties are generally considered well-established for surface-level benefits, though longer-term or deeper skin effects have not been extensively studied. It is typically positioned as a texture-enhancing ingredient rather than one with transformative benefits.
How to Use
This ingredient is most effective in leave-on products such as serums, moisturisers, and treatments where it can remain on the skin surface. It pairs well with other conditioning and humectant ingredients. If you have very oily skin, use sparingly or in lighter formulations to avoid heaviness. It can be used daily as part of your regular skincare routine.
Safety & Precautions
Frequently Asked Questions
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