Science
Mechanism of Action
This extract exerts its benefits primarily through powerful antioxidant activity, effectively scavenging free radicals to mitigate oxidative stress. Its anti-inflammatory action is achieved by modulating key inflammatory pathways, including the inhibition of NF-κB activation and the subsequent downregulation of pro-inflammatory cytokines such as TNF-α and IL-6. These mechanisms contribute to its soothing and potentially anti-aging effects.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Methanolic extracts of Fraxinus excelsior leaves, at concentrations of 20% and 50%, significantly decreased the release of pro-inflammatory cytokines (TNF-α, IL-6) in LPS-stimulated mononuclear cells in vitro.
- 02 Fraxinus excelsior leaf extract (FE) reduced TNF-α in LPS-stimulated neutrophils and monocytes in vitro by inhibiting NF-κB activation. Isolated constituents like ursolic and oleanolic acid from FE also reduced TNF-α and IL-12 levels in THP-1 cells.
Transparency
Dusting Analysis
No specific topical minimum effective concentrations or dusting thresholds are provided in the available research data to suggest common underdosing.
The Formula
Formulation
Stability
Fraxinus Excelsior Leaf Extract is water-soluble. While an explicit optimal pH range for final cosmetic product stability is not defined, extraction methods for its active compounds often involve polar solvents and can be optimized at slightly acidic pH, such as pH 4, suggesting stability in these conditions. No specific incompatibilities were identified in the provided data.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel and the Scientific Committee on Consumer Safety (SCCS) have not specifically assessed Fraxinus Excelsior Leaf Extract. The FDA status for this cosmetic ingredient is also not specifically defined. However, based on general safety data for related extracts and historical traditional uses, it is considered to have a low hazard profile. EWG Skin Deep rates it with 'LOW' concerns for Allergies & Immunotoxicity and Developmental and Reproductive Toxicity, and INCI Beauty reports 'No penalty' across all safety categories.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Fraxinus Excelsior Leaf Extract is a valuable ingredient, demonstrating strong in-vitro antioxidant and anti-inflammatory efficacy and broad skin compatibility with a low sensitization risk, making it suitable for various precision skincare applications.
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