Cholesterol

Cholesterol is a naturally occurring sterol lipid that is a critical structural component of human skin's lipid barrier. In cosmetic formulations, it functions as a biomimetic emollient and co-emulsifier that helps restore and maintain the skin's natural barrier function, particularly when combined with ceramides and fatty acids in a 1:1:1 ratio. Formulators value cholesterol for its ability to enhance skin penetration of active ingredients, stabilize lamellar structures in emulsions, and provide superior moisturization without greasiness, making it especially beneficial in barrier repair and anti-aging products.