Science
Mechanism of Action
Delivers astringent effects through tannin compounds that promote temporary skin tissue contraction, helping minimize pore appearance. The flavonoid content provides antioxidant activity to protect against environmental stressors, while also contributing to product viscosity control.
Research
Clinical Evidence
Low confidence1%
Key findings
- 01 Demonstrated antifungal activity against Candida albicans in herbal formulations (International Journal of Applied Dental Sciences)
- 02 Standard usage at 0.5-1% in cosmetic formulations for astringent and conditioning effects (INCIDecoder/CIR usage data)
Transparency
Dusting Analysis
Limited clinical research and CIR safety data gaps suggest genuine formulation challenges rather than marketing addition
The Formula
Formulation
Stability
Stable in aqueous cosmetic systems but degrades under extreme heat or high alkaline conditions due to polyphenolic sensitivity
Synergies
- Clay-based ingredients
- Other botanical astringents
Conflicts
- Strong oxidizing agents
- Ferric salts (tannin interaction causes discoloration)
Safety
Safety Profile
CIR Expert Panel concluded insufficient safety data in 2005 (reconfirmed). Potential contamination concerns include pesticide residues, arsenic, and heavy metals.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Limited safety data and sparse clinical evidence make this botanical extract a risky choice despite its traditional astringent properties.
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