Science
Mechanism of Action
This extract functions as an antimicrobial agent primarily due to its rich content of phenolic compounds and sorbic acid, which disrupt microbial cell membranes to inhibit the proliferation of skin pathogens like S. aureus, S. epidermidis, and P. acnes. Its significant antioxidant capacity, attributed to phenolic compounds such as gallic acid, chlorogenic acid, rutin, and quercetin, along with carotenoids, provides critical protection against oxidative damage. Beyond protection, it acts as a humectant to draw and retain moisture, offers soothing anti-inflammatory benefits for sensitive skin, and strengthens the overall skin barrier, leading to enhanced hydration and conditioning.
Research
Clinical Evidence
Medium confidence2-5%
Key findings
- 01 Demonstrated potent antimicrobial activity against key pyodermitis and acne pathogens including Staphylococcus aureus, Staphylococcus epidermidis, and Propionibacterium acnes, showing synergism with erythromycin.
- 02 Exhibited significant antioxidant activity, effectively protecting human plasma components (proteins and lipids) from oxidative damage.
- 03 Showed strong antibacterial efficacy against a range of Gram-positive bacteria (S. aureus, MRSA, Bacillus cereus, Enterococcus faecalis) and Gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa).
- 04 Considerably reduced nitration of tyrosine residues and formation of high-molecular-weight aggregates in human fibrinogen under oxidative stress conditions.
Transparency
Dusting Analysis
This extract exhibits strong efficacy in vitro at remarkably low concentrations, such as 0.010 µg/uL for antibacterial activity and 1-5 µg/mL for antioxidant protection. The recommended cosmetic formulation range of 2-5% for optimal results is substantially higher, indicating that typical usage concentrations will provide effective levels of its active compounds.
The Formula
Formulation
Stability
Optimal antimicrobial activity is observed at pH values below 6.5. Its natural acidity, similar to related fruits (e.g., pH 3.98-4.32), suggests robust stability in acidic formulation environments.
Conflicts
- Parasorbic acid (must be completely eliminated during the extract's processing, as it is toxic)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) and SCCS have not specifically reviewed Sorbus Aucuparia Fruit/Leaf Extract. However, sorbic acid, a key component, is generally recognized as safe (GRAS) by the FDA and approved by EFSA as a food preservative. The ingredient is listed as 'Suitable for cosmetics (1223/2009): all variants' in the EU. It is critical that the extract is properly processed to destroy toxic parasorbic acid through dehydration or volatilization. In vitro studies on renal cells observed cytotoxic effects at high concentrations (e.g., 19.1 µg/µL), underscoring the importance of adherence to appropriate cosmetic usage levels.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sorbus Aucuparia Fruit/Leaf Extract is a valuable, multifunctional ingredient offering significant antimicrobial, antioxidant, and hydrating benefits, suitable for a wide array of skin concerns when properly processed and formulated.
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