ANTIOXIDANT ENZYME ACTIVITIES
Oxidative stress-mediated DNA damage and tissue injury are related to cancer development.18,19 When the damaged cells divide, DNA duplication and cell metabolism become aberrant. Therefore, mutation is an important factor in carcinogenesis and oxidative damage could lead to carcinogenesis.20,21 Several studies reported that antioxidants inhibit oxidative damage and decrease abnormal cell division.22,23 Protective effect of antioxidants plays a critical role in prevention of cancer. Since gastrointestinal tract could easily be exposed to external and internal stimuli which produce ROS, the levels of antioxidants are especially important for preventing cellular damage. Antioxidants and