Science
Mechanism of Action
This ingredient operates through mechanical and biochemical pathways. Physically, the finely milled powder removes dead keratinocytes. Chemically, its high tannin content (up to 71%) acts as a natural astringent to regulate sebum and minimize pore appearance. Furthermore, it serves as a powerful enzymatic inhibitor, blocking collagenase and elastase to preserve the skin's structural integrity while stimulating cell adhesion molecules like fibronectin for enhanced firmness.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Demonstrated 96.4% collagenase inhibition at 50 ug/ml and 51% elastase inhibition at 100 ug/ml in vitro.
- 02 Achieved 47.2% tyrosinase inhibition at 500 ug/ml, suggesting significant brightening potential.
- 03 Post-microneedling application showed marked improvements in moisture retention and overall skin tone.
Transparency
Dusting Analysis
Because it is often marketed as a natural exfoliant, many brands include it at sub-functional levels for 'label appeal.' However, clinical data suggests its enzymatic benefits for anti-aging and brightening require specific concentrations (50-100 ug/ml) to be effective.
The Formula
Formulation
Stability
While the bulk powder is insoluble, its active polyphenols are water-extractable. It is most stable in slightly acidic environments; a pH above 6.5 may cause the tannins to oxidize and discolor the formula.
Synergies
- Niacinamide (pore refinement)
- Microneedling/MTS therapy
- Hyaluronic Acid (hydration boosting)
Conflicts
- Strong oxidizing agents
- Gelatin
- High pH environments
Safety
Safety Profile
Historically utilized in East Asian traditional medicine and skincare; recognized as safe for topical use, particularly in rinse-off applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An exceptional botanical active that bridges the gap between physical exfoliation and advanced enzymatic anti-aging.
Related
Similar Ingredients
Finding similar ingredients…
References
Sources