Science
Mechanism of Action
CHOLESTEROL/HDI/PULLULAN COPOLYMER operates through the distinct benefits of its components. Cholesterol, a critical lipid comprising roughly 25% of the skin's intercellular matrix, strengthens the skin's natural barrier, optimizes moisture balance, and acts as an emollient to soften texture and reduce the appearance of fine lines. Pullulan, a water-soluble polysaccharide polymer, creates a thin, elastic, moisture-absorbing film on the skin, which can provide an instant tightening sensation. In formulations, this copolymer primarily functions as an emulsion stabilizing agent, humectant, and viscosity controlling agent, ensuring product consistency, retaining hydration, and protecting against light degradation.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Cholesteryl-modified pullulan nanogels demonstrate stability at physiological pH (approximately 7.4), though they may undergo hydrolysis at pH 4.0 over several hours to days, indicating optimal stability in neutral to slightly basic environments.
Safety
Safety Profile
While the Cosmetic Ingredient Review (CIR) Expert Panel concluded that Cholesterol itself is safe for cosmetic use, there is no specific CIR or SCCS assessment for CHOLESTEROL/HDI/PULLULAN COPOLYMER as a whole. The maximum reported concentration for Cholesterol alone was 0.25% in non-spray face and neck preparations and moisturizing products in 2022, with earlier reports up to 3% in foundations. No direct FDA status for the copolymer itself was found; however, Cholesterol as an individual component has FDA safety attestations for food and pharmaceutical uses.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This copolymer is a valuable multi-functional ingredient, effectively supporting skin barrier integrity and hydration while enhancing product stability and texture across diverse cosmetic formulations.
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