Science
Mechanism of Action
The extract operates through three primary pathways: it stimulates the expression of essential barrier proteins (Involucrin and Loricrin) to promote keratinocyte differentiation, utilizes phenolic acids to neutralize heavy metal-induced oxidative stress, and biochemically lowers cortisol levels within skin cells to mitigate the visible effects of cutaneous stress.
Research
Clinical Evidence
High confidence0.5%
Key findings
- 01 In vitro RHE studies at 0.5% concentration demonstrated a significant increase in epidermal differentiation markers, facilitating skin barrier maturation.
- 02 Clinical testing confirms that concentrations between 0.01% and 1% provide protection against cigarette smoke and heavy metals while reducing cellular cortisol production.
Transparency
Dusting Analysis
While the extract shows biological activity as low as 0.01%, concentrations below 0.1% are often used for marketing claims ('label dusting') without providing the substantial barrier-reinforcement and anti-pollution benefits observed at the 0.5% clinical benchmark.
The Formula
Formulation
Stability
The extract contains heat-sensitive polyphenols; it must be stored in light-protected environments and incorporated during the cooling phase of production.
Synergies
- Ceramides
- Niacinamide
- Glycerin
Conflicts
- Strong oxidizing agents
- Alkaline environments (pH > 8.0) which cause darkening of the extract
Safety
Safety Profile
Listed as a safe skin-conditioning agent in the EU Cosing database. Purified cosmetic-grade extracts are non-irritating, though crude traditional preparations were historically linked to rare dermatitis.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A high-performance botanical essential for modern urban skincare, offering scientifically-backed protection against environmental pollutants and stress-induced barrier degradation.
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