**11.8 Ascorbic acid**

l-Ascorbic acid or vitamin-C is a monosaccharide antioxidant found in animals as well as in plants e.g., citrus fruits. Human body is not able to synthesize vitamin-C, so it is taken in food as regular diet. Inside the cell, it is maintained in its reduced form by reacting with glutathione, which further catalyzed by protein disulfide, glutaredoxins and isomerase [73].

Actually vitamin-C is a reducing agent and can reduce, thereby neutralize reactive oxygen species, such as hydrogen peroxide [74].
