Reduction of oxidized guanosine by dietary carotenoids: A pulse radiolysis study

► Oxidative damage of nucleosides involves guanosine. ► Radical quenching reduces oxidation of guanosine. ► Dietary carotenoids also convert oxidised guanosine to guanosine. ► Carotenoids give additional protection against free radical-induced damage of nucleic acid bases. ► Benefits for dietary carotenoids against oxidation damage.