Science
Mechanism of Action
This ingredient primarily acts as an emulsifier, stabilizing formulations by lowering surface tension between immiscible liquids like oil and water. As a surfactant, it facilitates the even distribution and solubilization of components, and in cleansing products, it helps suspend oil and dirt for easy rinsing. Its low ethoxylation (PEG-3) allows it to function as an emollient, aiding in the reduction of transeepidermal water loss and potentially enhancing skin barrier function.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 The Cosmetic Ingredient Review (CIR) Expert Panel concluded that PEG Sorbitan/Sorbitol Fatty Acid Esters, including PEG-3 Sorbitan Tristearate, are safe for use in cosmetics at concentrations up to 25%. While its role in formulation stability is well-established, specific concentration-dependent clinical efficacy data for direct skin benefits are not detailed in the provided research.
Transparency
Dusting Analysis
PEG-3 Sorbitan Tristearate is primarily a formulation aid (emulsifier, surfactant, emollient) rather than a direct active ingredient that would be 'dusted' in a clinical efficacy context. Its efficacy is largely tied to achieving desired formulation stability and texture.
The Formula
Formulation
Stability
As a waxy solid, PEG-3 Sorbitan Tristearate can increase formula viscosity and contributes to the stability of ointment bases against temperature fluctuations. Formulators should note potential oxidation and peroxide formation if exposed to temperatures above 50°C for extended periods, suggesting the inclusion of antioxidants in the finished product.
Conflicts
- No specific incompatibilities noted beyond the necessity for manufacturers to diligently control impurities such as 1,4-dioxane and ethylene oxide, which are potential by-products of the ethoxylation process.
Safety
Safety Profile
The CIR Expert Panel deems PEG-3 Sorbitan Tristearate safe for cosmetic use up to 25%. Importantly, the earlier recommendation against using PEGs on damaged skin has been removed due to evidence showing minimal dermal penetration even through compromised skin at cosmetic concentrations. Regulatory bodies like the SCCS and FDA concur with its safety, with the latter designating related compounds as safe for food use. Manufacturers are advised to ensure strict control over impurities like 1,4-dioxane and ethylene oxide.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-3 Sorbitan Tristearate is a valuable ingredient, safely utilized up to 25%, for its essential role in stabilizing complex formulations and its beneficial emollient properties for various skin types.
Related
Similar Ingredients
Finding similar ingredients…