Science
Mechanism of Action
Functions through multiple pathways: catechins (epicatechin, rutin, quercetin) and tannins inhibit tyrosinase enzyme activity to reduce melanin production, while simultaneously scavenging free radicals and providing anti-inflammatory effects by suppressing TNF-α and blocking NF-kB signaling pathways.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Demonstrated 61.58% tyrosinase inhibition at 120 mg/ml concentration (versus 98.73% for kojic acid reference)
- 02 Showed cytotoxic activity against cancer cells with IC50 of 100 μg/mL, indicating potent biological activity
Transparency
Dusting Analysis
Limited safety data and potential cytotoxicity at higher concentrations suggest careful formulation consideration rather than routine dusting.
The Formula
Formulation
Stability
High tannin content causes progressive darkening over time; requires cool, dry storage and is best incorporated into powder cleansers or stable suspensions to minimize oxidation.
Conflicts
- Iron salts (forms greenish-black precipitates)
- Strong oxidizing agents
- Alkaline environments (pH >6.5 causes color shift and catechin degradation)
Safety
Safety Profile
No published CIR safety assessment for cosmetic use; in vitro cytotoxicity observed at high concentrations (1000 μg/mL) requires cautious formulation approach.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Promising botanical with moderate efficacy but requires comprehensive safety evaluation before widespread cosmetic use.
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