Due to the complexity of the composition of foods, their antioxidant power depends on the synergistic effects and redox interactions between the different nutrient and ‘‘non nutrient’’ molecules, which together contribute to the possible health benefits. Therefore, recently, attention has been given to the antioxidant activity of fruits and vegetables, a parameter that allows a real evaluation of the nutritional value of foods (Lenucci et al., 2006; Pellegrini et al., 2007).