Science
Mechanism of Action
This ingredient operates on the skin through two primary mechanisms. As an emulsifier, its molecular structure effectively reduces surface tension between immiscible liquids, thereby forming stable emulsions that prevent product separation and ensure a consistent texture. Concurrently, it contributes to skin conditioning by aiding in the formation of a protective layer that helps to retain epidermal moisture, resulting in a smoother and more supple complexion.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyglyceryl fatty acid esters generally exhibit robust thermal stability under neutral conditions, maintaining integrity below 100°C. However, their ester linkages are susceptible to accelerated hydrolysis in the presence of strong acids or bases, and they can also be enzymatically degraded by lipases.
Conflicts
- strong acids
- strong bases
- oxidizing agents
- lipases
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Polyglyceryl-8 Stearate, among 274 other polyglyceryl fatty acid esters, safe for cosmetic use when formulated to be non-irritating. Furthermore, polyglycerol esters of fatty acids (up to and including decaglycerol esters) are approved by the FDA for safe use in food, reinforcing its favorable safety profile.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyglyceryl-8 Stearate is a valuable ingredient for enhancing product stability and texture through emulsification, while also offering notable skin-conditioning benefits with a robust safety profile.
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References
Sources