In the present work, the choice of oils mixture was based on a preliminary study that was aiming a new frying oil formulation for a Tunisian industry. During this preliminary study, different mixtures of oils (corn oil, sunflower oil, soybean oil, and palm olein oil) were prepared and studied. The mixture that was characterized by an interesting fatty acid composition, specifically unsaturated fatty acid one, was chosen to be used for formulation. Other parameters were also taken into account, especially those related to food security, physico-chemical properties, respective stability and costs of the oils considered. As a result, the mixture used in this study was formulated with sunflower oil and a soybean one in equal proportions. Characteristics of both oils before mixture are described in Table 1. An amount of rosemary extract
(RE) was added to this mixture. A control was prepared with the
same amounts of oils and obviously without any extract.