For Irganox 1076 and resveratrol, a very significant increase in OIT is observed with increasing antioxidant concentration, confirming their good antioxidant activities. Resveratrol shows a similar antioxidant activity than Irganox 1076, due to its unsaturation and OH group in para position to the ester, which offers a wide variety of resonance forms, increasing its antioxidant efficiency, as observed in the DPPH assay. These results are in line with the literature (López- .