This present review mainly focused on providing a brief and latest information on antioxidants its classification, antioxidants role in human body, pharmacology of antioxidants, benefits, list of foods which contain high antioxidant content and effects that causes due to overdose of antioxidants. All living organisms utilize oxygen to metabolize various substances and use the dietary nutrients in order to produce energy for survival. Oxygen thus is a vital component for all living aerobic organisms. Antioxidants are man-made or natural substances that may prevent or delay some types of cell damage, such as that caused by free radicals. Each of the living organisms thus have a complex network of antioxidant metabolites and enzymes that act together to prevent oxidative damage to cellular components such as DNA, proteins and lipids. These systems of antioxidants prevent these reactive oxygen species (ROS) species from being formed or remove them before they can damage vital components of the cell.
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