Polygonum Cuspidatum Root Extract

Product Description

Our Polygonum Cuspidatum Root Extract is high-purity botanical material from direct factory supply, extracted from authenticated Polygonum cuspidatum root with batch COA traceability for antioxidant and anti-aging formulators.

Trans-resveratrol, polydatin, and emodin stilbenes scavenge ROS, modulate tyrosinase activity, and inhibit AGE formation in aqueous serums without synthetic polyphenol substitutes.

CosIng-listed Japanese knotweed root meets demand for resveratrol-dense calm-actives in urban-defense and firming care, offering dual-stilbene depth beyond generic grape-seed or single-marker resveratrol powders.

Product Specification

• INCI Name: Polygonum Cuspidatum Root Extract
• CAS No.: N/A
• Botanical Source: Polygonum cuspidatum Siebold & Zucc. (Polygonaceae), root (Typical)
• Extraction Solvent: Ethanol / water (Typical)
• Active Marker: Trans-resveratrol, polydatin, emodin (Typical, HPLC-UV)
• Extraction Ratio: 10:1 (Typical)
• Appearance: Light brown to reddish powder or liquid (Typical)
• Solubility: Partially soluble in water; soluble in ethanol and glycols (Typical)
• Suggested pH: 4.5–6.5 in finished formulas (Typical)
• Assay Method: HPLC-UV for resveratrol and polydatin quantification (Typical)
• Shelf Life: 24 months sealed, below 25°C (Typical)
• Standard Packaging: 1 kg, 5 kg, 25 kg drums (Typical)
• Storage: Tightly sealed, cool, dry, away from light (Typical)
• Regulatory Status: Listed in CosIng (ID 58652); skin conditioning, antioxidant
• Quality & Testing: Microbial limits, heavy metals, pesticide screen per Typical COA
• Compliance Note: For cosmetic use only; patch test advised; protect from light; not for food or drug claims

Key Benefits & Applications

Polygonum Cuspidatum Root Extract delivers resveratrol-polydatin stilbenes for formulators building antioxidant, anti-aging, and tone-evening skincare systems.

• Trans-resveratrol and polydatin scavenge ROS and limit oxidative stress in daily antioxidant day serums.
• Knotweed stilbenes modulate tyrosinase activity for tone-evening essences and dark-spot treatment gels.
• Resveratrol inhibits AGE formation linked to collagen stiffness in firming day cream formulas.
• Emodin supports collagen organization and fibroblast protection in anti-aging treatment serums at 0.5–2%.
• Stilbene profile defends against photo-aging and urban oxidative triggers in pollution-exposed skin care.
• Calms inflammatory mediators in sensitive-skin recovery and post-treatment soothing formulas.

Formulation Guidelines

Use at 0.5–2% w/w in water-based antioxidant and anti-aging systems; maintain pH 4.5–6.5 and add below 40°C to preserve resveratrol markers.

• Recommended use level: 0.5–2% in serums, essences, and firming creams.
• Optimal formula pH: 4.5–6.5 to stabilize trans-resveratrol and polydatin actives.
• Add during cool-down below 40°C; protect from UV and heat during processing.
• Pre-dissolve in glycols or ethanol co-solvent for improved aqueous dispersion.
• Compatible with niacinamide and vitamin E in antioxidant urban-defense bases.
• Synergy: Ferulic Acid stabilizes stilbene actives when co-formulated with knotweed root in urban-defense day creams.