Science
Mechanism of Action
Functions through multiple pathways: terpenoids like bornyl acetate and limonene scavenge reactive oxygen species and inhibit lipid peroxidation, while flavonoid compounds including afzelin suppress myeloperoxidase activity and block pro-inflammatory cytokines IL-1β and TNF-alpha. Additionally provides mild astringent action by temporarily tightening skin proteins and enhances moisture retention in the stratum corneum.
Research
Clinical Evidence
Medium confidence0.5%
Key findings
- 01 In vitro studies show significant DPPH radical scavenging activity and cytokine inhibition at 0.1-1.0% concentrations
- 02 Flavonoid isolation studies identified afzelin as potent myeloperoxidase inhibitor for oxidative stress reduction
Transparency
Dusting Analysis
As a specialty botanical extract with meaningful bioactive compounds, concentrations below 0.05% likely provide minimal benefit beyond marketing claims
The Formula
Formulation
Stability
Highly susceptible to oxidation and photodegradation due to volatile terpene content. Requires opaque packaging and cool storage. Most stable in slightly acidic formulations that align with skin's natural pH.
Synergies
- vitamin E
- vitamin C
- other antioxidants
Conflicts
- strong oxidizing agents
- high heat processing
Safety
Safety Profile
Generally well-tolerated though oxidized terpenes may cause sensitization in susceptible individuals. Similar coniferous extracts have established safety profiles in cosmetic use.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A well-researched botanical antioxidant with multiple skin benefits, though formulation stability requires careful attention.
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References
Sources