... 5 3.GMP certificate 4.Specification 90%-99% EGCG Our product, EGCG(epigallocatechin gallate) is a kind of component ... water.Test Item: Appearance, Loss on drying, Total Ash, Assay, Heavy Metals, Arsenic, Microbiological.Packing: Nt.W:1kg/ ... 50% of the total green tea catechins includeing epigallocatechin gallate (EGCG), epigallocatechin (EGC), epicatechin gallate(ECG), epicatechin(EC), gallocatechin ...