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Abstract

Green tea is manufactured from the leaves of the plant Camellia sinensis and has been regarded to possess anti-cancer, anti-obesity, anti-atherosclerotic, antidiabetic, antimicrobial and antioxidant effects. The main bioactive components present in green tea are polysaccharides, flavonoids, vitamins B, catechin compounds, fluoride, etc. The credit for their useful antioxidant property lies with the huge collection of chemical substances called polyphenols and catechins. Green tea extracts exhibit stronger antioxidant protection for human body than vitamin C and vitamin E. Green tea has been found to aid in heavy metal detoxification by inhibiting its absorption and promoting excretion due to the antioxidant activities of green tea polyphenols such as catechin, which binds with heavy metals ions to form an insoluble complex -ionic salt that was used to remove them. Green tea components theanine and catechin have reproductive effects.