Science
Mechanism of Action
This ingredient operates through several key mechanisms: As an emollient, it effectively fills the microscopic gaps between dead skin cells, creating a protective film on the skin's surface. This action significantly retains moisture, promoting skin softness, smoothness, and overall health while acting as a barrier against allergens, bacteria, and irritants. Furthermore, its surfactant properties lower the surface tension between various product components, which facilitates the attraction and removal of dirt, oil, and impurities during cleansing. As an emulsifier, it is crucial for creating stable and homogenous mixtures of immiscible liquids, such as oil and water, thereby preventing product separation and enhancing texture and stability. Additionally, it offers moisturizing and conditioning benefits, improves product texture and spreadability, and demonstrates excellent dispersibility for inorganic powders and pigments.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyglyceryl-5 Triisostearate is soluble in oils and various organic solvents, though its solubility in water is limited. It exhibits remarkable stability against oxidation, making it a robust component in formulations. Its high compatibility with other skincare ingredients aids in stabilizing cosmetic mixtures, preventing separation and breakdown over time. It functions effectively as an oil phase solubilizer, enabling the incorporation of some water-soluble substances into oil-based products, and is particularly noted for its excellent dispersibility of inorganic powders and pigments.
Synergies
- Other skincare ingredients
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel evaluated Polyglyceryl-5 Triisostearate as part of a broader group of 274 polyglyceryl fatty acid esters, concluding they are safe for use in cosmetics under current practices and concentrations, provided they are formulated to be non-irritating. It is generally considered safe, non-irritating, and well-tolerated by the majority of skin types. Polyglycerol fatty acid esters have also received approval as food additives. A potential, albeit not confirmed, concern is its possible contribution to fungal acne (Malassezia folliculitis). Specific maximum concentration for Polyglyceryl-5 Triisostearate was not provided.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyglyceryl-5 Triisostearate is a valuable, multifunctional ingredient that enhances skin hydration and texture while stabilizing formulations, suitable for all skin types due to its low irritancy.
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