Science
Mechanism of Action
This extract’s efficacy is rooted in its high concentration of polyphenols, specifically ellagitannins like oenothein B, flavonoids, and phenolic acids. It acts as a powerful antioxidant by scavenging free radicals and enhancing intrinsic antioxidant defenses, including SOD, CAT, and GSH, driven by oenothein B. Its anti-inflammatory action is demonstrated through the inhibition of lipoxygenase and cyclo-oxygenase pathways and the down-regulation of inflammatory markers such as TLR2, hBD2, hBD3, and IL-8. Oenothein B further inhibits hyaluronidase and COX-1/COX-2 enzymes. For oily skin, it regulates sebum production by inhibiting 5-α-reductase, while also offering astringent effects to minimize pore appearance. It provides antibacterial defense, notably against Propionibacterium acnes, and strengthens the skin barrier by stimulating involucrin synthesis. Additionally, flavonoids within the extract offer anti-aging benefits by inhibiting collagenase and hyaluronidase, supporting collagen, and maintaining skin elasticity.
Research
Clinical Evidence
High confidence3%
Key findings
- 01 Inhibition of lipoxygenase activity, a marker of anti-inflammatory effect, was observed at 500 µg/mL.
- 02 A 3% concentration delivered significant photoprotective benefits following repeated application prior to UV exposure and post-UV treatment.
- 03 Anti-aging properties, evidenced by the down-regulation of UV-induced MMP-1, MMP-3, and hyaluronidase 2 gene expression, were noted at 10 µg/mL.
- 04 Formulations containing 5% extract demonstrated no skin irritancy in a 4-hour patch test, supporting its mild profile.
- 05 Typical cosmetic formulations utilize this extract within a 0.5-5% range, with raw material recommendations frequently citing 2-5% for targeted benefits like sebum regulation and soothing.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The concentration of phenolic acids, such as chlorogenic acid and oenothein B, within the extract can vary based on plant growth conditions and flowering period.
Conflicts
- No direct incompatibilities have been identified. However, to ensure optimal dispersion in purely water-based systems, solubilizers (e.g., Polysorbate 20) may be necessary for any oil-soluble components present in the extract.
- Formulators should also note that higher concentrations of flavonoids can impart a natural color to the final product.
Safety
Safety Profile
Generally considered safe for cosmetic use; however, individuals with known hypersensitivity to Onagraceae plants should perform a patch test. No skin irritancy was observed at a 5% concentration in clinical testing.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This versatile botanical extract offers a broad spectrum of benefits, making it a valuable ingredient for addressing concerns from inflammation and oiliness to aging and barrier support across all skin types.
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References
Sources