The objective of this work was to compare the levels of fatty acids between conventional commercial eggs and designer omega-3 eggs. It was used 864 Isa Brown line laying hens randomly distributed in two groups, so each cage with four birds was considered a replicate, totalizing 216 repetitions. In the group for production of conventional eggs, birds were fed corn- and soybean-based rations during the entire productive life while in the group for production of designer eggs, they were fed, from the 22nd week of age, rations with 1.5% of marine algae substrate and 1.8% fish oil. A total of 180 eggs was randomly collected from each group of the laying hens (totalizing 360 eggs), which were distributed in a randomized block design, considering each egg a replicate. Designer omega-3 eggs showed the lowest yolk index, but they did not differ from the conventional eggs regarded to the other parameters of quality. Means of omega-3 polyunsaturated fatty acids and monounsaturated fatty acids were higher for designer eggs. The relationships between polyunsaturated and saturated fatty acids and among omega-6 and omega-3 in designer eggs were close to the ideal estimated for human consumption. Means of the polyunsaturated fatty acids from the omega-6 series and of saturated fatty acids were significantly higher than omega-3 designer eggs.
