... [Used Part]Leaf[Active ingredient] Tea polyphenol[Specification] (1)Tea polyphenols>98%,Catechin>90%,EGCG 60-70%,caffein<0.5% (2 ... )Tea polyphenols>95%,Catechin70-80%,EGCG 45-50%,caffein0.5-9% (3 ... %,EGCG 25-30%,caffein1-11% (5)Tea polyphenols>30-50%,Catechin10-40%,EGCG 8-20%,caffein1-10%[Assay]UV[Characters]Light yellow ...