Polygonum cuspidatum

The most critical active ingredient is Resveratrol, typically standardized to levels ranging from 50% to 98% purity. Additionally, buyers should verify the content of Polydatin and Emodin. High-quality extracts should have low Emodin levels (typically <1%) to minimize laxative side effects if intended for dietary supplements.

Suppliers should provide a Certificate of Analysis (CoA) for every batch. Ensure the identity is verified via HPTLC (High-Performance Thin Layer Chromatography) and the active content is measured via HPLC (High-Performance Liquid Chromatography). It is essential to check for heavy metal limits (Lead <3ppm, Arsenic <2ppm) and pesticide residue compliance according to USP or EP standards.

It is widely used in the Nutraceutical industry for anti-aging and cardiovascular health supplements due to its high Resveratrol content. In the Cosmetic industry, it serves as a skin-whitening and anti-inflammatory agent. It is also utilized in Pharmaceuticals and as a natural dye source in the textile industry.

Polygonum Cuspidatum extract is highly sensitive to light, heat, and oxygen, which can cause Resveratrol to degrade. It must be stored in cool, dry conditions (below 25°C), away from direct sunlight, and sealed in double-layered food-grade plastic bags inside fiber drums. Vacuum packaging is preferred for high-purity (98%+) powders.

The product must comply with the destination country's food and drug regulations, such as FDA (GRAS status) in the US or EFSA (Novel Food) regulations in the EU. Ensure the supplier provides Phytosanitary Certificates and Cites compliance documentation if required to avoid customs seizure.

Prioritize Audited Suppliers who have undergone on-site inspections by third-party agencies like SGS or Bureau Veritas. Check for ISO 22000 or GMP (Good Manufacturing Practice) certifications, which are vital for ensuring the safety and consistency of herbal extracts.

Request a pre-shipment sample (PSS) that represents the actual bulk lot. Use Tiered Pricing strategies; for example, ordering 100kg vs. 500kg can often result in a 15-20% price reduction. Always specify the extraction solvent used (Ethanol vs. Methanol) as this impacts both price and safety compliance.

Utilize Secured Trading services on Made-in-China.com to protect your funds until delivery. For shipping, Air Freight is recommended for high-value extracts to minimize transit time and exposure to environmental fluctuations, while Sea Freight is more economical for bulk raw root materials.