Alpha-linolenic acid found
in English walnuts,
in some types of beans, and in canola, soybean, flaxseed/linseed, and olive oils. Olive oil would be the preferred source; avoid canola and soybean.
Docosahexaenoic acid (DHA) found in seaweed and cold water, fatty fish this is the one implicated in the recent study
Eicosapentaenoic acid (EPA) found in mackerel, salmon, trout and other cold water, fatty fish.