A quantum chemical study on the antioxidant activity of bioactive polyphenols from peanut (Arachis hypogaea) and the major metabolites of trans-resveratrol

► We demonstrate that the major trans-resveratrol metabolites and bioactive peanut polyphenols are efficient antioxidants. ► The results demonstrate that the compounds studied scavenge free radical according to H-transfer mechanism. ► The metabolites of trans-resveratrol are shown to have a similar ability to scavenge free radicals as the parent compound.