Science
Mechanism of Action
The fermentation process enzymatically cleaves high-molecular-weight tea catechins into smaller, more potent phenolic compounds known as Teadenols A and B. These molecules more effectively neutralize reactive oxygen species (ROS), inhibit tyrosinase activity to regulate melanin production, and stimulate the synthesis of natural moisturizing factors within the skin barrier.
Research
Clinical Evidence
High confidence2%
Key findings
- 01 Demonstrated significant anti-melanogenic activity and tyrosinase inhibition at a 1.0% concentration in B16 melanoma cells.
- 02 In vivo application at 2.0% to 5.0% resulted in a 33-40% improvement in epidermal hydration and a measurable reduction in transepidermal water loss (TEWL) over 4 weeks.
Transparency
Dusting Analysis
Many formulations include this ingredient at trace amounts for marketing claims; however, clinical data suggests a minimum threshold of 1.0% is required for melanin inhibition and 2.0% for significant barrier repair.
The Formula
Formulation
Stability
Highly stable in slightly acidic aqueous environments, though the fermented polyphenols are sensitive to UV exposure and oxidation. Formulation requires opaque, airless packaging to maintain biological activity.
Synergies
- Vitamin C
- Hyaluronic Acid
- Niacinamide
Conflicts
- Heavy metal ions (risk of chelation and discoloration)
- Strong oxidizing agents
- Certain high-molecular proteins
Safety
Safety Profile
While the CIR notes a usage level of 0.86% in standard leave-on practices, clinical evaluations often explore higher concentrations without adverse effects when formulated to be non-sensitizing.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A superior, bio-available evolution of green tea that excels in both pigment correction and deep epidermal hydration.
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References
Sources