Antioxidant effects

"Antioxidant effects" describe the biological actions of molecules that counteract oxidative stress by neutralizing free radicals and reactive oxygen/nitrogen species, thereby protecting cellular components such as DNA, proteins, and lipids from oxidative damage. These effects result from a diverse set of molecules, including enzymatic systems (e.g., superoxide dismutase, catalase, glutathione peroxidase) and non-enzymatic compounds (e.g., vitamins C and E, polyphenols, glutathione, flavonoids). Antioxidant effects play essential roles in health and disease prevention, modulating redox homeostasis and reducing the risk of various chronic diseases associated with oxidative damage, such as neurodegeneration, cardiovascular diseases, cancer, and aging-related disorders[1][4][5][6][7][9]. Note: "Antioxidant effects" should not be treated as a discrete therapeutic target (such as a specific protein or receptor), but rather as a collective property or outcome mediated by numerous molecular entities and biological processes. The correct approach is to identify and catalog the specific antioxidant molecule, enzyme, or pathway being targeted.

Other names

antioxidant activityfree radical scavengingoxidative stress protection

Donation of electrons or hydrogen atoms to neutralize free radicals (chain-breaking antioxidants). Chelation of transition metals to prevent Fenton reaction and ROS generation. Indirect induction of endogenous antioxidant enzymes via gene regulation (e.g., Nrf2 pathway). Inhibition of pro-oxidant enzymes such as NADPH oxidase and xanthine oxidase.