Science
Mechanism of Action
Laurus Nobilis, particularly its leaf extract, functions through a rich array of polyphenolic compounds, including flavonoids, phenolic acids, tannins, and lignans. These compounds are believed to impart antioxidant protection, combat bacterial proliferation, and exert anti-inflammatory effects by suppressing NLRP3 inflammasome activation and inhibiting nitric oxide production. Additionally, it is associated with wound healing via stimulation of blood circulation, cell proliferation, collagen production, and angiogenesis, and possesses antiseptic and astringent qualities.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Antimicrobial activity was observed with Laurus nobilis essential oil from leaves at 0.4 µL/mL against various microorganisms.
- 02 An antiproliferative effect on breast cancer cells (MCF7) was noted for ethanolic crude extracts of L. nobilis leaves at an IC50 of 24.49 μg/mL.
Transparency
Dusting Analysis
While Laurus Nobilis species demonstrate promising in-vitro activities (antioxidant, antimicrobial, anti-inflammatory), the available clinical data largely pertains to leaf extracts or essential oils, not specifically the branch extract. Claims of efficacy for 'branch extract' in precision skincare without specific studies may be extrapolative and lack direct substantiation, classifying it as commonly dusted for its specific form.
The Formula
Formulation
Stability
The integrity of thermolabile phenolic compounds within the extract can be compromised by high temperatures and extended extraction durations, potentially leading to undesirable reactions such as hydrolysis and enzymatic oxidation.
Safety
Safety Profile
While Laurus Nobilis Leaf Extract is classified as Generally Recognized as Safe (GRAS) by the FDA for food use, the European Commission's SCCS identifies it as an established contact allergen in humans, posing risks of allergic skin reactions, skin irritation, and serious eye irritation. Laurus Nobilis Leaf Oil has been noted to cause skin irritation at concentrations as low as 1% and is recommended for use at extremely low levels (0.1%). It is advised to avoid this ingredient during pregnancy, for children, and individuals with sensitive skin. The EWG also highlights high concerns for allergies, immunotoxicity, and use restrictions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Despite potential in-vitro benefits observed in related extracts, the high risk of sensitization and irritation, coupled with a lack of specific clinical data for the branch extract, renders this ingredient unsuitable for precision skincare formulations, especially for sensitive skin or during pregnancy.
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References
Sources