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During the last decades the consumer's concern in relation to the quality of the foods grew considerably. On those years the use of harmful components to the health was avoided as well as the search for functional foods or physiologically active components, also designated bioactives enhanced. Nowadays, the industry aims at a lesser use of synthetic products in foods. Therefore, food should carry through therapeutic functions and still not to present any risk to health. Fish attain these requirements well by furnishing the essential omega-3 polynsaturated fatty acids to the diet. Sardines are an excellent example. In several investigations it was verified that these fatty acids have a cardio-protector effect and they are related to malignant tumors incidence reduction. When administratin fish lipids to the diet, it is important to remember that a balance between polynsaturated fatty acids and antioxidants content is necessary in order to avoid lipid oxidation since it can cause important biological damages starting with the reduction of these essential lipids. Oxidative deterioration of lipids is one of the most important and frequent reactions presents in foods including fishes and has determined a series of studies linked to the free radicals behavior in the organism or in the food and to the identification of the agents that neutralize the highly reactive substances. Together with the consumer's preference for healthier products, an increase of the interest for the use of natural antioxidants can be observed as well as new researches in this area. In the search for healthier foods in a general way, the present work had as objective to contribute to the knowledge of the functionality of herbs as natural antioxidants.

Uso de ervas aromáticas na estabilidade oxidativa de filés de sardinha (Sardinella brasiliensis) processados