Science
Mechanism of Action
This extract functions through a multi-pathway biological approach: it acts as a natural astringent by utilizing tannins to physically constrict pores, while simultaneously inhibiting tyrosinase to modulate melanin production. On a structural level, it suppresses elastase—the enzyme responsible for breaking down elastin—and upregulates adhesion molecules like fibronectin to improve the skin's biomechanical elasticity and dermal integrity.
Research
Clinical Evidence
High confidence0.5%
Key findings
- 01 A 30-day clinical trial on human volunteers at 0.3% concentration demonstrated significant reductions in periorbital wrinkles and improved hydration without barrier disruption.
- 02 Topical application ranging from 1.0-5.0% showed measurable decreases in facial pore diameter and visible improvements in skin tone uniformity.
- 03 In vitro analysis confirmed potent antioxidant activity (DPPH scavenging) and tyrosinase inhibition at concentrations as low as 34.6 ug/mL.
Transparency
Dusting Analysis
Because it is effective at very low concentrations (clinical results seen at 0.3%), many brands include it at 'label-only' concentrations (below 0.1%) to claim pore-tightening benefits without providing the necessary polyphenol density for actual efficacy.
The Formula
Formulation
Stability
Highly heat-sensitive; must be incorporated during the cooling phase (below 45°C) to maintain polyphenol bioactivity. The extract is naturally acidic.
Synergies
- Vitamin C
- Niacinamide
- Hyaluronic Acid
Conflicts
- Strong oxidizing agents
- Iron salts
- Temperatures exceeding 45°C
Safety
Safety Profile
Generally regarded as safe due to its status as a common food source; clinical testing shows no cytotoxicity or erythema at active levels.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An exceptional multi-tasking botanical that delivers scientifically-backed improvements in pore architecture and skin elasticity.
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