Effect of quercetin, rutin, naringenin and epicatechin on lipid peroxidation induced in human sperm

► Dose dependent effect of Q, R, N, E (20-400 μM) on human sperm viability and motility. ► Q displayed little increased cytotoxicity versus the other flavonoids. ► Induced lipid peroxidation was decreased in sperm treated with Q and R (20-30 μM). ► Q showed the best antioxidant effect on sperm membrane, chromatin and acrosome.