The benefits of omega-3 fatty acids are well-documented: Two types—docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA)—may help prevent coronary disease, Alzheimer’s disease, and depression. And higher blood levels of omega-3’s has been associated with increased longevity. Omega-3 oils can come from marine, animal and plant sources. You should try to include omega-3 oils from all →