The omega-3 fatty acid alpha linolenic acid (ALA) is the precursor or “parent” to the two long-chain omega 3 fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Walnuts contain ALA and fatty fish contain EPA and DHA. Metabolic reactions enable ALA to be converted into EPA and DHA. Read the rest of this entry »