Science
Mechanism of Action
This ingredient functions through a synergistic action of its two main components. The polyhydroxystearate portion is recognized for its emollient, film-forming, and skin barrier-supporting properties, which are critical for retaining moisture and promoting skin softness and smoothness. Concurrently, the glycereth segment, common in glycereth esters, provides additional humectant, solubilizing, and emulsifying characteristics. This combined activity allows for the creation of stable emulsions, uniform pigment dispersion, and a superior sensory experience through improved product texture and spreadability.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Similar to other Glycereth esters, this ingredient is prone to oxidation and may undergo hydrolysis when exposed to strong acidic or alkaline conditions.
Conflicts
- Glycolic acid
- Benzoyl Peroxide
- Retinol
Safety
Safety Profile
A specific safety assessment for GLYCERETH-17 POLYHYDROXYSTEARATE by the Cosmetic Ingredient Review (CIR) is not available. However, Polyhydroxystearic Acid, a constituent, has been deemed safe by CIR in cosmetics, provided it is formulated to be non-irritating and non-sensitizing, with reported concentrations reaching up to 14.2% in specific applications like lipsticks. For the broader category of Glycerin Ethoxylates (which includes 'Glycereth-17'), CIR has reviewed the family, but for certain members (e.g., Glycereth-26 at 6% in leave-on products), further Human Repeated Insult Patch Test (HRIPT) data was requested.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While demonstrating valuable functional properties for emulsion stability and skin conditioning in formulations, a definitive safety and efficacy rating for GLYCERETH-17 POLYHYDROXYSTEARATE is limited by insufficient specific data.
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