Epidemiological and prospective studies have reported several beneficial effects of bioactive compounds on human health,particularly in protecting against chromic degenerative diseases ,such as cardiovascular disease,diabetes mellitus and cancer.Phonolic compounds,present in fruits and vegetables,show antioxidant and antiproliferative.A number of studies have suggested that high consumption of fruit and vegetables decreases the risk of colon cancer (Gallaher & Ttudo,2013).
The health benefits associated with tea (Camellia sinensis) consumption have been attributed in part to the antioxidant and free radical scavenging activity of the relatively high levels of flavonoids,including catechins, and other polyphenols present in tea.