Science
Mechanism of Action
This extract functions as a powerful antioxidant by neutralizing free radicals and mitigating oxidative stress. It enhances skin firmness and elasticity through its support of collagen synthesis and improves skin tone via enhanced microcirculation. Uniquely, it stimulates melanin production by activating the p38 MAPK pathway and inducing COX2 expression, alongside upregulating key melanogenic genes like MC1R, MITF, and tyrosinase. Furthermore, it exhibits anti-apoptotic effects by increasing Bcl2 expression, possesses natural antibacterial and anti-inflammatory properties, and acts as a gentle astringent to balance sebum and reduce blemishes.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 In cellular studies, concentrations from 0.0001% to 0.25% demonstrably increased melanin production, tyrosinase activity, and the expression of key melanogenic genes (MC1R, MITF, tyrosinase), with total melanin in SKMEL-28 human melanoma cells rising up to 247%.
- 02 Concentrations between 0.0135% and 0.0225% enhanced pigmentation and melanin formation in zebrafish embryos/larvae.
- 03 At 0.001% - 0.002%, it increased Bcl2 expression in 3D spheroid cultures of human dermal papilla cells, suggesting support for hair growth by elongating the anagen phase.
- 04 Clinical trials indicated a significant increase in black hair, associated with higher levels of total melanin, α-MSH, MC1R, and TYR.
- 05 Water extracts from the root demonstrated potent antioxidant capabilities, achieving up to 94.1% superoxide anion radical scavenging effect at 250 mg/kg.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Extracts are typically prepared using water or ethanol. Its free-flowing powder form and controlled mesh size facilitate easy blending with other botanicals, vitamins, and minerals.
Safety
Safety Profile
Generally regarded as safe for topical cosmetic use at lower concentrations. However, a patch test is highly recommended for sensitive skin due to documented instances of allergic reactions, including rashes and itching. It is crucial to distinguish this from oral consumption, where Polygonum multiflorum has been linked to severe, sometimes fatal, acute liver injury, as well as nephrotoxicity and embryotoxicity. These oral toxicities are associated with specific components but can be reduced by processing and compatible use, and are not typically observed with topical application.
Your Skin
Skin Compatibility
Our Assessment
Verdict
With strong evidence for antioxidant action, melanin stimulation, and overall skin and hair health support, Polygonum Multiflorum Root Extract offers valuable multifunctional benefits for precision skincare.
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