Science
Mechanism of Action
This oil functions primarily through its rich estragole (methylchavicol) and phenolic profile, which actively scavenges reactive oxygen species (ROS). It further mitigates skin irritation by suppressing the expression of pro-inflammatory cytokines, specifically IL-1β and TNF-α, in human keratinocytes.
Research
Clinical Evidence
Medium confidence0.01%
Key findings
- 01 Demonstrated an IC50 of 115 µg/mL for free radical scavenging in DPPH assays (Baser et al., 1998).
- 02 In vitro suppression of pro-inflammatory mediators IL-1β and TNF-α in HaCaT cells (Zengin et al., 2024).
Transparency
Dusting Analysis
Due to strict IFRA restrictions on estragole content (limiting finished products to approximately 0.01%), many brands include this ingredient at negligible trace amounts purely for botanical label claims rather than therapeutic efficacy.
The Formula
Formulation
Stability
Highly volatile and sensitive to photo-oxidation; requires stabilization with lipid-soluble antioxidants like Tocopherol and storage in light-protected amber packaging.
Synergies
- Tocopherol
- Ascorbyl Palmitate
- Complementary botanical oils
Conflicts
- Strong oxidizing agents
- High pH environments
Safety
Safety Profile
Classified as GRAS by the FDA, but usage is strictly governed by IFRA due to high estragole content (up to 95%), which limits its presence in leave-on cosmetics to very low thresholds.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A potent botanical antioxidant that requires precise dosing to remain within safety thresholds while providing biological protection.
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References
Sources