This E-book covers the main aspects about the benefits of omega-3 long chain polyunsaturated fatty acids (LC-PUFAs) to human health. The knowledge of physiological effects of LC-PUFAs at different levels is constantly expanding. Topics covered over 10 chapters thoroughly detail the role of omega-3 LCPUFAs in nutrition (gene regulation) and disease (clinical applications); information about food sources and recent intake recommendations is also explained. This book also discusses current data concerning the role of LC-PUFAs during pregnancy and lactation, in cognitive function, immune response, allergy, asthma, cardiovascular diseases, depression, obesity, and insulin resistance. The book should be useful for advanced graduate students, public health officials as well as researchers working with LC-PUFAs.