Milk thistle

The primary active compound in Milk Thistle is Silymarin, which is a mixture of flavonolignans including Silybin (Silibinin). For B2B procurement, the industry standard is typically an extract ratio of 80% Silymarin (measured via UV-Vis) or higher than 50% Silybin (measured via HPLC). Ensure the supplier specifies the extraction solvent used, as Ethanol or Ethyl Acetate are preferred over harsher chemicals like Methanol to ensure consumer safety.

Since Milk Thistle is consumed as a dietary supplement or herbal medicine, suppliers must hold GMP (Good Manufacturing Practice) certification. For entry into the US market, FDA Facility Registration is required. For the EU, compliance with EFSA regulations and REACH is necessary. Additionally, look for ISO 22000 or HACCP for food safety management, and Organic certifications (USDA Organic or EU Organic) if your target market prioritizes clean-label products.

Buyers should request a Certificate of Analysis (COA) for every batch. Key parameters to verify include Heavy Metal limits (Lead <0.5ppm, Mercury <0.1ppm), Microbiological limits (Total Plate Count <1000 cfu/g, E. coli/Salmonella negative), and Pesticide Residue analysis (must meet USP <561> or EC 396/2005 standards). PAHs (Polycyclic Aromatic Hydrocarbons) testing is also critical for botanical extracts to ensure they haven't been contaminated during the drying process.

Milk Thistle is primarily used in Liver Support supplements, Detox formulations, and Hangover recovery products. It is available in various forms: Standardized Powder for encapsulation, Water-Soluble Extract for functional beverages, and Softgel-grade oil. When sourcing, specify the mesh size (usually 80-100 mesh) to ensure compatibility with your specific filling or tableting machinery.

The biggest risk is Adulteration, where suppliers may add synthetic dyes or cheaper herbal fillers to mimic high Silymarin content. Another risk is Customs Seizure due to improper labeling or lack of 'Novel Food' status in certain jurisdictions. To mitigate this, always use Third-Party Inspection services (like SGS or Intertek) to conduct random sampling from the warehouse before the final payment is released.

Focus on Volume-Based Tiered Pricing. For orders exceeding 500kg, you can typically negotiate a 10-15% discount. Request Free Samples (50g-100g) for lab testing before committing to a bulk order. For payment, prioritize Escrow services or Trade Terms that allow for a 30% deposit and 70% balance after the Pre-shipment Inspection (PSI) report is approved.

Milk Thistle extract is hygroscopic (absorbs moisture) and sensitive to light. Ensure the supplier uses double-layer PE bags inside fiber drums with a desiccant. For sea freight, specify 'Cool and Dry' storage away from heat sources. If shipping to humid climates, consider Vacuum Packaging to prevent clumping and degradation of the active Silymarin compounds during transit.

Verify if the supplier is an Audited Supplier on Made-in-China.com, which indicates their business license and production capabilities have been verified by independent agencies. Check their Export Experience specifically to your country to ensure they are familiar with your local Customs and Health Authority documentation requirements, such as the Phytosanitary Certificate.