Antioxidant mechanism of grape procyanidins in muscle tissues: Redox interactions with endogenous ascorbic acid and α-tocopherol

► Procyanidins protect fish muscle against lipid oxidation. ► Procyanidins retard extensively the decay of endogenous α-TOH. ► Procyanidin-supplementation protects endogenous AA at short term. ► Procyanidins reinforce the antioxidant defense of muscle via regeneration of α-TOH.