Both green tea and black tea are derived from the same plant, the tea plant (Camellia sinensis). The parts used are the leaf bud and the two adjacent young leaves together with the stem, broken between the second and third leaf. Older leaves are considered inferior in quality. Green tea is produced by lightly steaming the fresh-cut leaf, while to produce black tea the leaves are allowed to oxidize. During oxidation, enzymes present in the tea convert polyphenols, which possess outstanding therapeutic action, to compounds with much less activity. With green tea, oxidation is not allowed to take place because the steaming process inactivates these enzymes. Green tea is very high in polyphenols with potent antioxidant and anticancer properties. The chemical composition View the rest of this article
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