... 51-5 3.GMP certificate 4.Specification 90%-99% EGCG Our product, EGCG(epigallocatechin gallate) is a kind of component ... is according to customer requirementBiological effects:(-)-Epigallocatechin gallate (egcg), an most potent antioxidant polyphenols of green tea, ... It makes up about 10-50% of the total green tea catechins includeing epigallocatechin gallate (EGCG), epigallocatechin (EGC), epicatechin ...