Science
Mechanism of Action
This cationic polymer, possessing a positive charge, is electrostatically drawn to the naturally negatively charged surface of the skin. Upon adhesion, it generates a thin, imperceptible protective film that effectively smooths microscopic irregularities, imparting a distinct soft and silky tactile feel. This barrier functions to significantly reduce transepidermal water loss (TEWL), thereby bolstering skin hydration and aiding in moisture retention. Furthermore, its antistatic capabilities help to neutralize static electricity on the skin, a factor that can otherwise contribute to sensations of dryness, tightness, and the attraction of environmental particulate matter. POLYQUATERNIUM-4 also exhibits humectant properties, drawing and binding ambient moisture to the skin to further support its hydrated state.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
POLYQUATERNIUM-4 demonstrates robust chemical and temperature stability, maintaining its integrity across a broad pH range of 3 to 7. It exhibits resistance to both acidic and alkaline conditions.
Safety
Safety Profile
The broader class of polyquaternium polymers has been affirmed as generally safe by the Cosmetic Ingredient Review (CIR) Expert Panel for cosmetic use. Specifically, the Environmental Working Group (EWG) assigns POLYQUATERNIUM-4 a low hazard score of 1 out of 10, indicating minimal concerns regarding potential carcinogenic, allergenic, immunotoxic, or reproductive/developmental risks. It is not considered to be potentially toxic or harmful, and general polyquaterniums are often noted for their low irritation potential.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYQUATERNIUM-4 is a valuable, safe film-forming polymer that enhances skin hydration and smoothness, particularly beneficial for dry skin types, though specific clinical efficacy data remain limited.
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References
Sources