Hair Conditioning
HYDROXYPROPYLTRIMONIUM HYDROLYZED MILK PROTEIN
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A quaternized (cationic) version of milk protein — excellent for repairing and conditioning damaged hair. Dairy-origin.
Hydroxypropyltrimonium hydrolyzed milk protein is hydrolyzed milk protein (casein/whey hydrolysate) chemically modified with hydroxypropyltrimonium groups, giving it a permanent positive charge. This cationic modification makes it highly substantive to negatively charged damaged hair cuticles, delivering superior repair and conditioning feel versus unmodified protein hydrolysates. Parent hydrolyzed milk protein has food-grade safety precedent. Typical use in hair conditioners, masks, and leave-ins. Allergen considerations for milk-allergic users; not vegan. No dedicated SCCS opinion located for this modified protein. No GHS hazards at cosmetic use levels.
Function
Skin benefits
- Cationic milk protein conditioner highly substantive to damaged hair
- Excellent conditioning and repair feel
- Strong food-grade safety precedent of parent protein
Known concerns
- Dairy origin; not vegan
- Milk allergy risk in sensitive users
- Preservation required due to protein substrate
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related hair conditionings
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.