Science
Mechanism of Action
This extract acts as a ligand for the Aryl Hydrocarbon Receptor (AHR), which triggers the OVOL1 transcription factor to upregulate the synthesis of essential barrier proteins, filaggrin and loricrin. Furthermore, it activates the NRF2 pathway to boost endogenous antioxidant enzymes (NQO1, HO1) while suppressing NF-κB and nitric oxide production to mitigate pro-inflammatory signals.
Research
Clinical Evidence
High confidence0.03%
Key findings
- 01 In vitro testing at 0.03% demonstrated significant upregulation of skin barrier proteins FLG and LOR via the AHR/OVOL1 signaling pathway (PMID: 28892013).
- 02 Bactericidal and anti-biofilm activity against Streptococcus mutans was observed at concentrations between 0.04% and 0.32%.
Transparency
Dusting Analysis
Because biological activity occurs at very low levels (0.03%), many formulations include it at 'label-claim' concentrations below 0.01% which may fail to trigger the AHR/OVOL1 barrier response.
The Formula
Formulation
Stability
The extract exhibits peak antioxidant stability in acidic environments; its polyphenolic compounds are prone to rapid degradation and loss of efficacy in alkaline conditions (pH > 5.0).
Synergies
- Niacinamide
- Ceramides
- Panthenol
Conflicts
- Alkaline environments
- Strong oxidizing agents
- High pH formulations
Safety
Safety Profile
While generally safe and traditionally used, in vitro data indicates that concentrations exceeding 0.3% may reduce human epidermal keratinocyte viability.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An excellent precision active for barrier reinforcement and soothing, provided it is formulated within an acidic pH range and kept below the 0.3% cytotoxic threshold.
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References
Sources