Science
Mechanism of Action
It constructs a non-occlusive, breathable film on the skin's surface. This physical mesh works via a three-way protection strategy: it blocks fine particulate matter (PM2.5), heavy metals, and carbon particles; it limits the impact of UV-induced damage; and it neutralizes domestic chemical aggressors. Furthermore, it regulates the inflammatory response by inhibiting the release of pro-inflammatory markers like IL-1α and PGE2.
Research
Clinical Evidence
High confidence3%
Key findings
- 01 Clinical data indicates that a 5% concentration significantly attenuates the release of IL-1α and PGE2 in human epidermis models exposed to heavy metals and PM2.5.
- 02 In vivo testing at 1-3% demonstrates a measurable reduction in the adhesion of fine particulate matter to the skin and hair surfaces.
Transparency
Dusting Analysis
Because it is effective at low concentrations, brands often include it at trace amounts (<0.5%) for 'anti-pollution' marketing claims without providing the film-forming density required to actually block PM2.5 adhesion.
The Formula
Formulation
Stability
Highly stable across a broad pH range; typically supplied as an aqueous solution. Must be stored away from direct heat to maintain polysaccharide integrity.
Synergies
- Antioxidants
- Hyaluronic Acid
- UV Filters
Conflicts
- Cationic surfactants
- Polyquaterniums
- High concentrations of electrolytes/salts
Safety
Safety Profile
Classified as Generally Recognized as Safe (GRAS) and non-toxic for topical application by the CIR Expert Panel.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An essential shielding ingredient for urban skincare formulations requiring a physical, breathable defense against microscopic pollutants.
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