The health of our body is maintained by the equilibrium of Oxidation and Reduction. As long as a balance exists between oxidative stress and our antioxidant system, our body is maintained in a healthy state. However, excessive oxidative stress or inadequacy in a normal cell’s antioxidant defense system (or both) can cause the cell to experience oxidative stress. Tumor cells usually have an imbalanced redox status resulting in the damage to DNA, proteins and lipids. Higher levels of DNA damage and deficient DNA repair may predispose individuals to cancer.