oxygen species deplete the antioxidant defenses of the cell thus making it more susceptible to oxidative damage. It further targets lipid, DNA and protein leading to their oxidation which further leads to changes in cellular structure and function. GSH plays a crucial role as a free radical scavenger in addition to the main- tainance of plasma antioxidant status. Superoxide dismutase con- verts superoxide to a less reactive ROS, hydrogen peroxide which is further reduced to water by catalase. Thus, catalase assists SOD in