... [Used Part]Leaf[Active ingredient] Tea polyphenol[Specification] (1)Tea polyphenols>98%,Catechin>90%,EGCG 60-70%,caffein<0.5% (2)Tea ... %,caffein0.5-9% (3)Tea polyphenols>80%,Catechin>55%,EGCG >35%,caffein1-10% (4)Tea polyphenols>70%,Catechin>50%,EGCG 25-30%,caffein1-11 ... % (5)Tea polyphenols>30-50%,Catechin10-40%,EGCG 8 ...