Science
Mechanism of Action
This ingredient operates as a positively charged (cationic) polymer, forming ionic bonds with the skin's naturally negatively charged surface. On the skin, it creates a non-occlusive film that reduces transepidermal water loss (TEWL), thereby improving hydration levels. It also adsorbs onto skin cells, smoothing irregularities for a refined texture and a softer feel, while also improving the adherence of formulations to the skin.
Research
Clinical Evidence
Medium confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyquaternium-16 exhibits robust stability across a broad spectrum of pH levels and temperatures, ensuring consistent performance under recommended storage conditions.
Conflicts
- strong oxidizing agents
- strong bases
- strong acids
- iron
- iron salts
- steel
- copper
- copper alloys
- aluminum
- oxygenizers
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Polyquaternium-16 safe for use within established cosmetic guidelines. However, prolonged application of products with excessively high concentrations may lead to a perceived greasy or heavy skin feeling due to product build-up.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyquaternium-16 is a valuable ingredient offering effective conditioning, film-forming, and hydrating benefits, suitable for a wide range of skin types with a low irritancy profile.
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