Science
Mechanism of Action
This water-soluble derivative of chitosan functions as a polyanionic film-former. By binding water molecules to its structure, it forms a semi-occlusive, protective matrix that significantly limits transepidermal water loss (TEWL) while acting as a physical shield against airborne environmental pollutants.
Research
Clinical Evidence
High confidence1%
Key findings
- 01 In vivo testing at 3% concentration revealed hydration and complexion-enhancing capabilities more than 300% greater than standard hyaluronic acid.
- 02 Studies at 0.5% to 2% demonstrated measurable improvements in stratum corneum moisture retention and overall tissue elasticity.
- 03 1% concentration is validated as the benchmark for achieving optimal formulation stability alongside antimicrobial benefits.
Transparency
Dusting Analysis
Because it is an expensive specialty polymer, brands often include it at 'label claim' levels (under 0.1%). To see the superior hydration benefits that outperform hyaluronic acid, a minimum threshold of 0.5% is required.
The Formula
Formulation
Stability
Highly versatile compared to native chitosan; it remains soluble even in alkaline environments up to pH 12, though it is most stable for skin applications at a physiological pH.
Synergies
- Humectants
- Low-viscosity serums
- Non-ionic surfactants
Conflicts
- High electrolyte/salt concentrations
- Strongly anionic thickeners
Safety
Safety Profile
Recognized as biocompatible and biodegradable. While not yet formally reviewed by the CIR, it maintains an EWG hazard score of 1 and fungal-derived versions are considered GRAS.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An elite moisture-locking ingredient that provides a superior sensory profile and barrier protection compared to traditional humectants.
Related
Similar Ingredients
Finding similar ingredients…
References
Sources