... <1% Green Tea ExtractGreen, black, and oolong tea are all derived from the leaves of the Camellia sinensis plant. Originally cultivated ... Weight loss, Anti-OxidantTechnical Specification:Test Specification Description Extract from Green Tea leaves In the form of a fine powder ... United States. Green tea is prepared from unfermented leaves, the leaves of oolong tea are partially fermented, and black tea ...