Science
Mechanism of Action
This ingredient functions by depositing an imperceptible, ultra-thin polymeric film onto the skin or hair. This physical barrier serves to mitigate or prevent damage from exogenous factors such as chemical irritants, ultraviolet radiation, and pollution, thereby contributing to the preservation of skin integrity.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
While a specific optimal pH range for POLYESTER-39's stability in cosmetic formulations is not documented, studies on general polyester polymers indicate that degradation can be accelerated in highly alkaline environments, such as pH 12, compared to more neutral conditions around pH 6.84.
Safety
Safety Profile
POLYESTER-39 has not undergone a specific safety assessment by the Cosmetic Ingredient Review (CIR) panel. However, broader research on general polyester monomers suggests they do not bind to or activate androgenic and estrogenic receptors, implying a potential lack of endocrine disruptive activity.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to a comprehensive lack of specific clinical efficacy, safety, and detailed formulation data for POLYESTER-39, its overall utility and precise impact in skincare formulations remain largely undetermined.
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References
Sources