01Buyer guides

Raw material buyer guides

For buyers and formulators: how to write a specification, how to read a certificate, and the things suppliers usually leave out. Specification, analysis and regulation only — no health claims.

Fisetin oral exposure: what unformulated 98% powder actually deliversThe human PK arithmetic on fisetin, done in full — and what it means for anyone specifying the raw material. Why “98% by HPLC” does not describe dihydromyricetin qualityDHM has two chiral centres, and the standard assay cannot see either of them. What to specify instead. How to buy bulk fisetin: five questions that separate one “98%” from anotherBotanical source, related flavonoids, urushiol, quercetin interference, and writing a spec where no monograph exists. How to buy bulk dihydromyricetin: grades, source and the specification most buyers missThe grade ladder, vine tea sourcing, China's 2026 approval, solubility, and the specification line most buyers never write. Sourcing amino acids from China: a due-diligence guide for buyersMonograph grade vs feed grade, reading a CoA properly, trader vs manufacturer, lead times and Incoterms.