Science
Mechanism of Action
This ingredient operates as an amphoteric polyelectrolyte, constructing a breathable, semi-permeable lattice on the skin's surface. This structure utilizes carboxyl and amino groups to secure hydration through intermolecular hydrogen bonding—rivaling hyaluronic acid in prolonged retention—while simultaneously providing antimicrobial protection and stimulating fibroblast activity to accelerate structural tissue repair.
Research
Clinical Evidence
High confidence1%
Key findings
- 01 A 0.25% aqueous solution demonstrated moisture retention capacity equivalent to a 20% propylene glycol solution.
- 02 At a 0.5% concentration, it exhibited significantly higher moisturizing efficacy than standard glycols within 30 minutes of application.
- 03 Higher 5.0% hydrogel concentrations significantly accelerated re-epithelialization and wound contraction in clinical models.
Transparency
Dusting Analysis
Because Carboxymethyl Chitosan shows measurable moisture retention at just 0.25%, brands often include it at trace amounts (<0.1%) to claim 'chitosan' on the label without achieving the film-forming or regenerative benefits seen in higher-dose clinical data.
The Formula
Formulation
Stability
Highly soluble across a broad pH range compared to native chitosan; however, it remains sensitive to extreme thermal shifts and prolonged UV exposure.
Synergies
- Hyaluronic Acid
- Ceramides
- Glycerin
Conflicts
- Strong oxidizing agents
- Strong reducing agents
- Strong acids
- Strong alkalis
Safety
Safety Profile
Generally recognized as biocompatible and non-toxic. However, individuals with severe shellfish allergies should exercise caution as it is typically sourced from crustacean chitin.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A high-performance multifunctional biopolymer that excels in moisture retention and barrier recovery, outperforming many common synthetics at low concentrations.
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References
Sources