Science
Mechanism of Action
This ingredient functions by reducing the interfacial tension between immiscible oil and water components. Its molecular structure possesses both hydrophilic (polyglycerol) and lipophilic (stearic acid) segments, enabling it to bridge these phases and create stable, consistent emulsions. Additionally, the stearic acid portion contributes to its emollient activity, providing a softening and smoothing effect on the skin.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Members of the polyglyceryl fatty acid ester group, including Polyglyceryl-4 Tristearate, exhibit good inertness and stability across various formulation conditions. Related compounds demonstrate excellent resistance to salts and acids, which further supports emulsion stability.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deemed polyglyceryl fatty acid esters, including Polyglyceryl-4 Tristearate, safe for cosmetic use under current practices and concentrations, provided formulations are non-irritating. However, in 2016, Polyglyceryl-4 Tristearate was noted as 'not reported to be in current use,' and no specific FDA status has been identified for this exact ingredient.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyglyceryl-4 Tristearate is a valuable functional ingredient for enhancing emulsion stability and providing emollient benefits, though specific clinical efficacy data for skin applications are limited and its current use is not widely reported.
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