Several studies indicate that catechins and polyphenols in general, from fruits, vegetables, tea and red wine, have prophylactic properties that are beneficial to the health of humans. A lower relative risk for stomach [3], esophageal [4] and lung cancer [5] has been shown with increased tea consumption.Increased tea consumption has also been associated with a decreased incidence of stroke [6], lower atherogenic index [7] and improved liver function.