Shizma Junejo, Zara Sami, Faiza Rafique Shaikh.
Dietary Antioxidant an Indispensible Nutrient.
J Bahria Uni Med Dental Coll May ;9(1):80-2.

being extremely reactive as well as unstable1. They can lead to chemical reactions alongside different molecules. Having been originated from constituents like oxygen, sulphur as well as nitrogen which contribute towards production of reactive oxygen species (ROS), reactive nitrogen species (RNS), reactive sulphur species (RSS)1.They include superoxide anion(O2-?), hydroperoxyl radical (HO2?), hydroxyl radical (?OH), hydrogen peroxide (H2O2), singlet oxygen (1 O2), hypochlorous acid (HOCl) and peroxynitrite (ONOO- ) . Free radical species are formed in the course of plentiful oxidative metabolic processes in mitochondria 1. There is extremely mild equilibrium between the making together with the counteraction of ROS through antioxidants. As a consequence whenever the equilibrium gravitates towards over production of ROS then as a sequel to oxidative stress cells begin deteriorating.

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