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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.
One type is the omega-3 fatty acid, which is plentiful in some kinds of fishânot to be confused with omega-6 fatty acids, found in meats, corn oil, and soybean oil. Some research finds that Americans eat about 20 times more omega-6 than omega-3; we should be aiming to get closer to four times as much.