Science
Mechanism of Action
This extract mediates its dermatological effects through multiple pathways. It effectively inhibits mast cell degranulation, thereby reducing the release of histamine, and suppresses nitric oxide (NO) production, contributing to its notable anti-inflammatory and anti-allergy actions. Possessing robust antioxidant capabilities, it actively mitigates oxidative stress. Its comprehensive anti-photoaging mechanism involves inhibiting MMP-1 (a collagen-degrading enzyme), upregulating COL1A1 (a gene promoting collagen synthesis), suppressing MAPK/AP-1 activation, activating the TGF-β/Smad2/3 signaling pathway, and balancing p53/p21 expression to prevent UVB-induced cellular senescence. The key active components include sesquiterpenes like petasins, polyphenolic compounds such as Fukinol, Fukinolic acid, and kaempferol, along with triterpene glycosides.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Increased collagen synthesis was observed in MC3T3-E1 cells when treated with the extract at concentrations ranging from 10-40 µg/mL (in vitro).
- 02 The extract demonstrated significant inhibitory activity against nitric oxide (NO) production in RAW 264.7 cells, achieving an IC50 of 19 ± 4.9 µg/mL (in vitro).
- 03 In hairless mice, oral administration of a hot water extract (KP-1) from P. japonicus leaves for 13 weeks significantly reduced UVB-induced wrinkle area, epidermal and dermal thickening, and transepidermal water loss, while effectively restoring collagen density and skin hydration.
- 04 Oral administration of a 1% P. japonicus extract to C57BL/6 mice for 16 weeks led to a significant decrease in plasma TBARS and triglyceride concentrations, indicating notable antioxidant effects, with no observed toxic symptoms.
Transparency
Dusting Analysis
Specific data on dusting thresholds or red flag percentages for topical application of this ingredient is not available within the provided research.
The Formula
Formulation
Stability
Optimal pH range and specific stability considerations were not detailed in the provided data.
Conflicts
- Individuals with known allergies or sensitivities to plants within the Asteraceae family (e.g., ragweed, daisies, chrysanthemums) may experience allergic reactions due to cross-reactivity with non-heat-resistant allergens.
Safety
Safety Profile
A standardized hot water extract (KP-1) of P. japonicus leaves has been deemed safe in mouse studies, demonstrating no oral toxicity, 13-week repeated oral toxicity, or genotoxicity, and did not induce hepatotoxicity or nephrotoxicity. However, there is a moderate risk of allergic reactions in individuals sensitive to Asteraceae plants. Crucially, extracts must be processed to rigorously minimize or remove pyrrolizidine alkaloids (PAs), which are potentially toxic compounds present in the plant, particularly at higher concentrations in roots compared to leaves.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Petasites Japonicus Leaf/Stem Extract is a valuable ingredient, offering significant anti-inflammatory, antioxidant, and anti-aging benefits suitable for all skin types, provided the extract is correctly processed to mitigate potential allergens and toxic pyrrolizidine alkaloids.
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References
Sources