As commented on above, the antioxidant activity of edible films and coatings is greatly influenced by the water availability, which in turn is affected by both the moisture of the product and the ambient relative humidity. In dry conditions (low moisture products) the network structure of the film or coating is tightly packed and its oxygen permeability is very limited. This mechanism by itself may have positive effects on the preservation of the quality,because of the reduced oxygen availability in the coated product. In some cases, the addition of antioxidants can entail further protection due to the enhancement of the oxygen barrier properties of the film (Ayranci and Tunc, 2003, 2004). However, in these conditions of reduced molecular mobility no chemical activity of the antioxidant agents can be observed and the only antioxidant effect is due to the oxygen barrier effect, as concluded by Atar?s et al.(2010). On the other hand, in wet systems the coating network is plasticised and mass transference is favoured. In this context, the oxygen permeability of the film or coating is dramatically increased and the specific activity of antioxidant agents could becomemorerelevant.