Omega-3 fatty acid is found naturally in some foods. You can get adequate amounts of omega-3 by eating a variety of foods, including the following:
-Fish and other seafood (especially cold-water fatty fish such as salmon, mackerel, tuna, herring, and sardines)
-Nuts and seeds (such as flaxseed, chia seeds, and walnuts)
-Plant oils (such as flaxseed oil, soybean oil, and canola oil)