It is evident that oxidative stress is associated with the development
of many chronic and degenerative diseases. Apparently,
reactive oxygen species (ROS) such as hydroxyl
radical (OH•), superoxide anion (O
2 ), and hydrogen peroxide
(H2O2) produced during normal metabolic activities or as
a consequence response to abnormal stress, might be implicated
in the pathogenesis of aging and several diseases. ROS
exhibits deleterious effects on biological macromolecules
such as proteins, lipids, and DNA. The human body develops
a very delicate mechanism to eliminate free radicals from the
body (Davies 2000).