Fig. 5From: Structural basis of the anti-ageing effects of polyphenolics: mitigation of oxidative stressSummary of key features of polyphenols that contribute to direct or indirect antioxidant activity through ROS scavenging or NRF2 upregulation (upper and lower panels respectively). Black dotted boxes indicate catechol and olefin groups; red indicates important groups (also outlined with pale grey dotted ovals)Back to article page