Drinking green tea is known to provide numerous health and medical benefits. In order to understand the benefits that are provided by green tea, it is important to understand What Is Green Tea Extract. Green tea extract has been used by the Chinese since ages to treat various health problems such as headaches, body aches, depression, stress and many other problems. It has been also used to increase the longevity and improve the overall health and well being of a person. It is the ingredients of the green tea, which are responsible for the amazing health benefits provided by green tea.