Marine oils are today valuable products with widely nutritional and food applications because of their high content of long-chain omega-3 fatty acids. Originally, marine oils were by-products from the manufacture of fish meal. However, research in the last years has demonstrated important health benefits of long-chain omega-3 fatty acids for both humans and animals. The present work reviews the health and nutritional effects of the most important omega-3 marine oils fatty acids (eicosapentaenoic acid [EPA] and docosahexaenoic acid [DHA]), the nutritional bioavailability of these fatty acids, the technological alternatives to include them into different foods, and the actual great valorization of DHA. Also, it discusses the incorporation of these fatty acids to public nutritional and health policies, and the technological challenge that must be encouraged by the fish oil producers to incorporate into their manufacture practices to the requirements of the new nutritional utilization of these valuable products.
