Omega-3 fatty acids refer to a group of polyunsaturated fatty acids found in certain foods. Alpha-linolenic acid is considered an essential fatty acid (EFA) for humans because the body cannot make it from other fatty acids. It is found in plant foods, specifically flax seeds, walnuts, hemp seeds, and certain greens. EPA and DHA (docosahexaenoic acid) are long chain omega-3 fatty acids found in animal foods (fish and wild game) as well as in some algaes. They are the primary constituents of fish oils that seem to protect against heart attack, stroke, cancer and inflammatory diseases like rheumatoid arthritis.
I'm interested: what's your main source of these essential fatty acids?