Science
Mechanism of Action
This extract operates through multiple mechanisms to enhance skin health. Its antioxidant properties, largely attributed to phenolic compounds and flavonoids like ellagitannins and quercetin glucuronide, neutralize free radicals. Anti-inflammatory effects are observed through the suppression of mediators such as IL-1β, IL-6, and TNF-α. For anti-aging, it promotes matrix collagen contraction, actin polymerization, and the production of extracellular matrix (ECM) proteins by increasing MYLK gene expression, while inhibiting MMP-1 and MMP-2, enzymes responsible for collagen degradation. Hydration is improved by increasing hyaluronic acid levels and the expression of moisturizing genes (HAS2, AQP3). It also strengthens the skin barrier by recovering filaggrin expression and helps regulate sebum production by inhibiting palmitic acid-induced activity in sebocytes.
Research
Clinical Evidence
Medium confidenceN/A
Transparency
Dusting Analysis
No data suggests Oenothera Biennis Leaf Extract is commonly used at ineffective 'dusting' percentages for marketing purposes.
The Formula
Formulation
Stability
Aqueous extracts from Oenothera biennis cell cultures (derived from leaves) have been successfully prepared in a phosphate buffer at pH 7.4. While phenolic acids exhibit similar solubility in water and ethyl alcohol, some flavonoid aglycones present in Oenothera biennis may have lower water solubility compared to alcoholic extracts.
Safety
Safety Profile
Oenothera Biennis extract exhibits a generally favorable safety profile, regarded as tolerable and non-allergenic, with infrequent reports of mild irritation or itching. European cosmetics regulations permit its use, recommending adherence to specific concentrations. Oral toxicity studies of methanol extracts from Oenothera biennis leaves indicated low to non-toxic effects even at high acute (2000 mg/kg) and sub-acute (200/400 mg/kg) doses. It is important to note that the FDA's 'Inadequate basis for expectation of safety' status for Evening primrose oil pertains to its use as a new dietary ingredient and does not specifically apply to the topical leaf extract.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Oenothera Biennis Leaf Extract is a valuable ingredient, offering comprehensive benefits across anti-aging, hydration, soothing, and barrier support, making it suitable for a wide range of skin types and formulations.
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References
Sources