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The highest concentrations of omega-3 fatty acids are found in coldwater fish, such as sardines, salmon, herring, tuna, cod, mackerel, halibut, and shark. These fatty acids are also found in lower concentrations in plant foods such as flaxseed, walnuts, Great Northern beans, kidney beans, navy beans, and soybeans.
Salmon, flax seeds and walnuts are excellent sources of omega 3 fatty acids. Very good sources of these healthy fats include scallops, cauliflower, cabbage, cloves and mustard seeds. Good sources of these fats include halibut, shrimp, cod, tuna, soybeans, tofu, kale, collard greens, and Brussels sprouts.xamples of foods that contain these fats include salmon, trout, herring, avocados, olives, walnuts and liquid vegetable oils such as soybean, corn, safflower, canola, olive and sunflower.