Bioconcepts green tea extract is a digestive antioxidant green tea contains oils vitamins minerals and caffeine but the primary constituents of interest are the polyphenols particularly the catechin called epigallocatechingallate egcgr what is green tear green tea is made solely with the leaves of camellia sinensis that have undergone minimal oxidation during processingr why take green tea extractr you can get the benefit of several cups of green tea in one convenient tablet with bio