DPPH tests quantifying their ability to scavenge free radicals were also carried out. 3,4-DHB, BDO-3,4DHB, Irganox 1076 and resveratrol showed very good antioxidant efficiency, with the best results obtained with resveratrol. This is due to the presence of the unsaturation and 4hydroxystilbene group, which ensures delocalization and stabilization of the formed radical.