For pharmaceutical or supplement grade sourcing, the concentration of Cordycepin, Adenosine, and Polysaccharides must be verified via HPLC (High-Performance Liquid Chromatography) testing. Suppliers should provide a Certificate of Analysis (COA). Compliance with Pharmacopoeia standards (such as ChP, USP, or EP) is essential. Additionally, ensure the product meets heavy metal limits (Lead, Arsenic, Mercury, Cadmium) and pesticide residue requirements for your specific target market, as these are strictly regulated in cross-border trade.