GMP factory supplys Green Tea Extract(Gamellia sinensis O.Ktze)with specification Tea polyphenol 40%,80%, ... %)4. Tea polyphenol 98% (Catechin:80%, EGCG:50%, Caffeine:0.5%)Part of useLeaf Shelf Life2 yearsPhysical CharacteristicsAppearanceBrown yellow fine powderOdor ... hazardous and toxic materials during store and transportation. Green Tea Extract