many living organisms. However, excessive reactive oxygen species,produced in vivo during some oxidative reactions, are not only strongly associated with lipid peroxidation but also involved in the development of some diseases .Recently, increasing numbers of reports confirm that many fruits and vegetables may afford protection against some chronic diseases caused by oxidative stress. This is mainly attributed to their antioxidant constituents, including vitamin C, vitamin E, carotenoids,flavonoids and anthocyanins . Polyphenols and anthocyanins are important components in fruit tissues. These compounds are thought to be instrumental in combating oxidative stress. They can prevent some oxidation-related diseases such as atherosclerosis, cardiovascular and neurodegenerative diseases and cancer