Science
Mechanism of Action
This extract exerts its benefits through multiple biological pathways. It functions as a powerful antioxidant by efficiently scavenging free radicals and dose-dependently reducing reactive oxygen species (ROS) generation. Its anti-photoaging effects stem from inhibiting UVB-induced matrix metalloproteinase-1 (MMP-1) expression via the MAPK/AP-1 and NF-κB signaling pathways, which helps prevent extracellular matrix degradation. The extract also enhances the skin's oxidative defense capacity by improving Nrf2/HO-1 signaling and stimulates procollagen type I synthesis through the activation of TGF-β signaling. Additionally, it exhibits anti-inflammatory and anti-allergic properties, modulating skin inflammation by reducing mediators such as nitric oxide (NO), PGE2, and various cytokines, and by inhibiting histamine activity through HDC, MAPK, and calcium influx regulation. These diverse actions are attributed to its rich content of flavonoids, phenylpropanoids, tannins, fatty acids, and terpenoids.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 In *in vitro* studies on UVB-irradiated HaCaT cells, concentrations ranging from 1, 10, and 50 μg/mL demonstrated efficient free radical scavenging and dose-dependent reductions in reactive oxygen species (ROS) generation. This concentration range also effectively decreased UVB-induced matrix metalloproteinase-1 (MMP-1) expression by inhibiting MAPK/AP-1 and NF-κB signaling, preventing extracellular matrix degradation. Furthermore, it improved Nrf2/HO-1 signaling to enhance oxidative defense capacity and activated TGF-β signaling to promote procollagen type I synthesis, indicating strong potential against skin photoaging.
- 02 Topical application of Rosa davurica leaf extract in a DNCB-induced atopic dermatitis mouse model significantly improved various symptoms, including reduced dorsal skin and ear thickness, decreased clinical dermatitis severity, and a reduction in mast cell presence *in vivo*. In parallel *in vitro* studies using TNF-α/IFN-γ-stimulated HaCaT cells, the extract effectively reduced inflammatory mediators such as nitric oxide (NO), PGE2, and cytokines, while also decreasing the phosphorylation of MAPK and NF-κB.
Transparency
Dusting Analysis
Given its scientifically backed antioxidant, anti-photoaging, and anti-inflammatory mechanisms, combined with its suitability for all skin types and wide range of applications, Rosa Davurica Leaf Extract is a genuinely active and versatile ingredient. It is unlikely to be included in formulations merely for 'dusting' purposes, as its comprehensive benefits provide significant value.
The Formula
Formulation
Safety
Safety Profile
While no specific Cosmetic Ingredient Review (CIR), Scientific Committee on Consumer Safety (SCCS), or FDA (for cosmetic use) assessments are available, Rosa Davurica Leaf Extract is generally considered safe for topical use. However, individual intolerance or allergic reactions, though rare, cannot be entirely excluded.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Rosa Davurica Leaf Extract is a valuable botanical ingredient, offering comprehensive protection against photoaging, potent antioxidant defense, and significant anti-inflammatory benefits, making it suitable for a wide range of skin concerns.
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References
Sources