Antioxidants are critical for maintaining health, they come in two forms, exogenous (outside) and endogenous (within). The immune system creates ROS (reactive oxygen species) likely due to pathogenic invasion, ROS destroys cells, organs and tissues. Adequate supplementation can help manufacture the endogenous antioxidant system (glutatione, catalase, superoxide dismutase) and preserve the endogenous compounds. Vitamins C, E, polyphenols etc help.
Abstract
The balance between oxidation and antioxidation is believed to be critical in maintaining healthy biological systems. Under physiological conditions, the human antioxidative defense system including e.g., superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione (GSH) and others, allows the elimination of excess reactive oxygen species (ROS) including, among others superoxide anions (O2.-), hydroxyl radicals (OH.), alkoxyl radicals (RO.) and peroxyradicals (ROO.). However, our endogenous antioxidant defense systems are incomplete without exogenous originating reducing compounds such as vitamin C, vitamin E, carotenoids and polyphenols, playing an essential role in many antioxidant mechanisms in living organisms.
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