Science
Mechanism of Action
This extract functions as a robust antioxidant, actively neutralizing reactive oxygen species (ROS) by augmenting antioxidative enzyme activity and shielding cells from oxidative stress. It significantly mitigates inflammation through suppression of key pathways including IL-1α, PGE2, and NF-κB activation. Rich in bioactive compounds such as ginsenosides, flavonoids, B vitamins, and polysaccharides, it supports collagen synthesis, stimulates skin renewal via dermal papilla cell differentiation, and inhibits melanin production for a more uniform skin tone. Furthermore, it offers protection against UV-induced damage to keratinocytes and dermal fibroblasts.
Research
Clinical Evidence
Medium confidenceN/A
Transparency
Dusting Analysis
While an in vitro study demonstrated significant efficacy at 50 µg/mL (approximately 0.005%), the highest reported concentration for Panax quinquefolius root extract in cosmetic products is 0.002% in rinse-off formulations, with no concentrations specified for leave-on products. This discrepancy suggests the ingredient may often be utilized below its clinically effective threshold, potentially diminishing its functional impact in finished formulations, especially in leave-on applications.
The Formula
Formulation
Stability
Panax quinquefolius root extract is reported to be stable for 2 years in a sealed container and demonstrates stability at 1-3% concentrations in ethanol across a broad pH range of 2-10 (duration not specified). However, for related red ginseng extracts, maintaining a pH between 6-8 is crucial to minimize the degradation of major marker and bioactive compounds, as acidic conditions (e.g., pH 2) can lead to significant loss of components like Rg3.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel determined Panax ginseng root extract, a closely related species often considered interchangeably in safety assessments, as safe for cosmetic use, with concentrations commonly reported up to 0.5%. For Panax quinquefolius root extract specifically, the maximum reported concentration is 0.002% in rinse-off products. It is generally well-tolerated with few reported side effects, though individual sensitivities necessitate patch testing. No irritation has been linked to its major constituents like Rh2, Rh3, Rb1, or compound K. The FDA lists 'AMERICAN GINSENG' as a validated substance.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Panax quinquefolius root extract is a valuable ingredient, demonstrating potent antioxidant and anti-inflammatory properties that support skin health, hydration, and a visibly youthful, even-toned complexion.
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References
Sources