Science
Mechanism of Action
This ingredient acts by significantly reducing the surface tension between different phases, allowing for the stable emulsification of oil and water-based components. As a solubilizer, it facilitates the uniform dispersion of otherwise insoluble ingredients, and as a cleansing agent, it assists in effectively lifting and rinsing away impurities. Furthermore, it contributes to skin suppleness by reducing flaking, particularly beneficial for dry or compromised skin surfaces.
Research
Clinical Evidence
Medium confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
PEG Soy Sterol ingredients are waxy solids. No specific optimal pH range for stability was identified in the research data.
Conflicts
- Should not be used on damaged skin due to potential systemic toxicity and sensitization concerns, particularly with PEGs on burned skin.
Safety
Safety Profile
The CIR Expert Panel has concluded that PEG-5, -10, -16, -25, and -40 Soy Sterol are safe for use in cosmetics. However, it is recommended to avoid its application on damaged skin due to observed kidney effects associated with PEGs on burned skin. Manufacturers are advised to control small amounts of 1,4-dioxane, a potential by-product, through purification steps. This ingredient is compliant with general provisions of the EU Cosmetics Regulation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-40 Soy Sterol is a valuable, low-risk ingredient renowned for its emulsifying and solubilizing properties, contributing to product stability and offering mild conditioning benefits for most skin types.
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References
Sources