Science
Mechanism of Action
Functions through multiple pathways: inhibits tyrosinase enzyme to reduce melanin production, blocks NF-kB inflammatory cascades to suppress cytokines like TNF-α and IL-10, and provides potent antioxidant protection via catechins (up to 66.9% concentration) that neutralize free radicals and prevent cellular damage.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Tyrosinase inhibition study showing 61.58% melanin suppression at 120 mg/ml concentration
- 02 SPF enhancement demonstration achieving SPF 24 independently and SPF 30 when combined with UV filters
- 03 12-week anti-inflammatory safety study (oral) confirming systemic tolerability without adverse effects
Transparency
Dusting Analysis
Limited commercial adoption due to CIR data insufficiency concerns, reducing likelihood of token usage in mainstream formulations
The Formula
Formulation
Stability
Maintains stability in slightly acidic to neutral pH ranges; alkaline conditions cause catechin oxidation resulting in formulation browning
Synergies
- Physical UV filters
- Chemical sunscreens
- Other antioxidants
Conflicts
- Strong oxidizing agents
- Iron salts
- Gelatin
- Alkaloids
Safety
Safety Profile
CIR Expert Panel (1998, 2005) determined insufficient data for cosmetic safety assessment, specifically lacking sensitization, irritation, and UV absorption studies
Your Skin
Skin Compatibility
Our Assessment
Verdict
Promising botanical with strong efficacy data but regulatory safety gaps limit confident recommendation for precision skincare applications.
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References
Sources