Science
Mechanism of Action
As a cationic polymer, POLYQUATERNIUM-91 establishes an electrostatic adhesion to the negatively charged elements within the skin's stratum corneum. This interaction facilitates the formation of a subtle, non-occlusive polymeric film, which acts as a physical barrier to significantly reduce transepidermal water loss (TEWL). Furthermore, this compound may function as a humectant, actively attracting and binding moisture to the skin, thereby bolstering overall hydration and mitigating dryness.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) panel deems POLYQUATERNIUM-91 safe for use provided formulations ensure it is non-irritating and respects concentration limitations derived from maximum reported 'as used' levels. A specific numerical maximum concentration is not stipulated, but its safety profile is contingent on judicious formulation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYQUATERNIUM-91 is a valuable film-forming polymer for skincare, supporting hydration and improving skin texture through its ability to reduce transepidermal water loss, making it suitable for all skin types when properly formulated.
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References
Sources