Green Tea Extract is a popular plant extract.The polyphenol is extracted from the bud and the leaf of the Camellia sinensis o.ktze.Green tea contains polypheols compound about 10-24%.Because ferment for many times so thepolypheols compound redueced, just about 6%.In the tea leaf mainly contains Gall-lepigallocatecholand a little epigallocatechol and epigallocatechin EGC , L-epicatechinEC and so on.Various tea on sale, caffeine is about 2-4% and the polypheols is about 12-15%additionally about 0.6% essential oil, is the aroma scent in Green tea.