Green tea Green tea Green tea is a type of tea that is made from "Camellia sinensis" leaves that have not undergone the same withering and oxidation process used to make oolong teas and black teas. Green tea originated in China, but its production and manufacture has spread to many other countries in Asia. Several varieties of green tea exist, which differ substantially based on the variety of "C. sinensis" used, growing conditions, horticultural methods, production processing, and time of harvest. Although there has been considerable research on the possible health effects of consuming green tea regularly, there is little evidence that
History of tea "Camellia sinensis"—the area including the northern part of Burma, and Yunnan and Sichuan provinces of China. Yunnan Province has also been identified as "the birthplace of tea...the first area where humans figured out that eating tea leaves or brewing a cup could be pleasant." Fengqing County in the Lincang City Prefecture of Yunnan Province in China is said to be home to the world's oldest cultivated tea tree, some 3,200 years old. According to "The Story of Tea", tea drinking likely began in Yunnan province during the Shang Dynasty (1500 BC–1046 BC), as a medicinal drink. From there, the drink