The American Heart Association recommends consuming both omega-3 fatty acids, found in cold-water fish like salmon and canola oil, and omega-6 fatty acids, found in nuts, seeds and vegetable oils such as corn oil.
Most big studies confirming the cardiovascular benefits of omega-3s have tested either docosahexaenoic acid (DHA), an omega-3 found in salmon, sardines and breast milk, or another fish oil called eicosapentaenoic acid (EPA).