Antioxidant activity via flavonoids

Antioxidant activity via flavonoids refers to the biochemical process by which polyphenolic compounds known as flavonoids mitigate oxidative stress and cellular damage. This activity is primarily mediated through three mechanisms: the direct scavenging of reactive oxygen species (ROS), the chelation of transition metals like iron and copper to prevent radical formation, and the activation of endogenous antioxidant defense systems such as the Nrf2/ARE signaling pathway [1][2]. While these processes are vital for maintaining redox homeostasis, the term describes a broad functional activity rather than a specific molecular target like a protein receptor or enzyme [3]. In clinical research, flavonoid-mediated antioxidant activity is associated with protective effects against cardiovascular disease, neurodegeneration, and certain types of cancer [4]. However, the development of flavonoids as therapeutic agents is often hindered by their low oral bioavailability, rapid metabolism, and the potential to act as pro-oxidants under specific physiological conditions [5].

Other names

Flavonoid-mediated antioxidant activityRadical scavenging by flavonoidsPolyphenolic antioxidant mechanism

Flavonoids exert antioxidant effects by donating hydrogen atoms to free radicals, chelating transition metal ions (such as iron and copper) to inhibit the production of hydroxyl radicals, and inducing the expression of phase II antioxidant enzymes via the Nrf2/ARE signaling pathway [1][2].