ABSTRACT

Green tea has been found to possess a high antioxidant activity owing to its high content of catechins.1 Processes used in the manufacture of black and pu-erh teas are known to decrease the levels of monomeric catechins to a much greater extent of polymerization that leads to the formation of theaavins and thearubigins. The production and consumption of partially fermented oolong tea and drastically fermented pu-erh tea are conned to China.