Science
Mechanism of Action
This advanced ingredient functions primarily by creating a continuous, invisible film on the skin, hair, or nails, which acts as a barrier to prevent transepidermal water loss and lock in moisture. As a derivative of Poly-gamma-glutamic acid (PGA), it is also expected to share PGA's robust ability to bind multiple times its weight in water, intensely boosting skin hydration. Beyond its direct hydrating role, the PGA heritage suggests potential benefits in stimulating natural collagen production, enhancing skin firmness and elasticity, and offering protective antioxidant properties against environmental stressors, thus improving overall skin health and resilience.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
While specific optimal pH ranges for the crosspolymer are not explicitly detailed, its parent molecule, poly-γ-glutamic acid (γ-PGA), exhibits pH-dependent structural changes. Its pKa is noted around 4.8, suggesting potential sensitivity to significant pH fluctuations which could impact its conformation and molecular interactions in aqueous solutions.
Safety
Safety Profile
Specific safety assessments by CIR or SCCS for SODIUM POLYGAMMA-GLUTAMATE CROSSPOLYMER are currently unavailable. The related ingredient, Sodium Polyglutamate (without the crosspolymer designation), holds the safest rating of 1 from the EWG. While generally well-tolerated and considered safe for most skin types, there are rare instances where individuals with highly sensitive skin may experience mild irritation. No specific toxicological data or maximum concentration limits for the crosspolymer form were identified.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A valuable multi-functional ingredient, it significantly enhances skin hydration and barrier function through its film-forming and humectant properties, contributing to a smoother, plumper complexion.
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