control. To help detoxify ROS, enzymatic and non-enzymatic antioxidants including speroxide dismutase (SOD), glutathione, α-tocopherol (vitamin E), catalase, will react with most oxidants. In addition, the antioxidant enzymes catalase and glutathione peroxidase detoxify H2O2 by converting it to O2 and H2O. However, when ROS levels exceed the antioxidant capacity of a cell, a deleterious condition known as oxidative stress occurs. Unchecked, excessive ROS can lead to the destruction of cellular components