Why don't other Chinese teas have similar health-giving properties? Green, oolong, and black teas all come from the leaves of the Camellia sinensis plant. What sets green tea apart is the way it is processed. Green tea leaves are steamed, which prevents the EGCG compound from being oxidized. By contrast, black and oolong tea leaves are made from fermented leaves, which results in the EGCG being converted into other compounds that are not nearly as effective in preventing and fighting various diseases.
Green tea is made solely with the leaves of Camellia sinensis that have undergone minimal oxidation during processing. Green tea originates from China[1] and has become associated with many cultures in Asia from Japan and South Korea to the Middle East. Recently, it has become more widespread in the West, where black tea is traditionally consumed. Many varieties of green tea have been created in countries where they are grown. These varieties can differ substantially due to variable growing conditions, horticulture,[2] production processing, and harvesting time.
The Kissa Yojoki (Book of Tea), written by Zen priest Eisai in 1191, describes how drinking green tea can have a positive effect on the five vital organs, especially the heart. The book discusses tea's medicinal qualities, which include easing the effects of alcohol, acting as a stimulant, curing blotchiness, quenching thirst, eliminating indigestion, curing beriberi disease, preventing fatigue, and improving urinary and brain function. Part One also explains the shapes of tea plants, tea flowers, and tea leaves, and covers how to grow tea plants and process tea leaves. In Part Two, the book discusses the specific dosage and method required for individual physical ailments.
High in antioxidants and other vital properties, green teas have endured as one of the most revered and consumed beverages for thousands of years. Chinese legend dates green tea back to 2737 BC, when the emperor Shen Nong was boiling water next to an open window, and tea leaves blew through the window and into the pot. He drank the concoction, and enjoyed it so much that tea became a favorite beverage in China. Aside from drinking tea for pleasure and enjoyment, the Chinese have also used it as an indispensable medicinal tool and have treated a host of maladies and illnesses through its continued use. Green tea is now consumed around the world, and because of its anti-oxidant value it is currently being studied for numerous health benefits, and as a treatment for a number of illnesses.
