Dietary sources of Omega-3 Fatty Acids and Dietary Requirements
While most people's everyday dietary intake of Omega-3 fatty acids is far below the recommended level, it is fortunate that these fatty acids may be found in many of the foods that we eat. In this section we will outline various sources of Omega-3 fatty acids and their nutrient density, so to speak, in terms of
Docosahexaenoic Acid (DHA) and
Eicosapentaenoic Acid (EPA). This section is currently under development and as such, merely includes a very basic list at this moment. We intend to make this section a sizeable database of information for those seeking ways to incorporate more Omega-3 fatty acids into their diet. For overall recommendations of how much DHA a person should take in all walks of life, please review our
Omega-3 Recommendations page.
Seafood
In terms of nutrient density, the best source of Omega-3 fatty acids is seafood, since the oil in fish has high concentrations of the important fatty acids, DHA and EPA. As the body only converts only a portion of the precursor fatty acid
Alpha-Linolenic Acid (ALA) into DHA and EPA, the largest concentrations of DHA and EPA specifically are to be found in deep dwelling, cold water fish. Fatty fish such as salmon, herring, mackerel, sardines, and tuna are significant sources of Omega-3 fatty acids, and two 3 ounce servings per week are recommended. Most seafood contains these essential faty, including shellfish, however generally speaking the more fat a fish has, the greater the concentration of Omega-3s.
Seeds and Nuts
Many seeds and nuts are excellent sources of Omega-3 fatty acids, particularly ALA. Walnuts and Flax seeds are particularly high in these fats and make a nice snack as well. These foods should generally be eaten raw as heat may reduce the health benefits of these fats.
Flax Seeds
Flax seeds are easily added to many other foods, however have the ability to pass through the body undigested. For this reason, they should be crushed or chopped prior to ingestion in order for the body to access the oil rich interior. Flax oil is another option, however it has a short shelf life and must be kept refrigerated.
Walnuts
While walnuts make an excellent treat by themselves, they may be added to many foods. Walnut oil is a particularly nice addition to many salad dressings.
Sources
Goyens PL, Spilker ME, Zock PL, et al. Compartmental modeling to quantify alpha-linolenic acid conversion after longer term intake of multiple tracer boluses. J Lipid Res, 2005. 46:1474-83.
The Mayo Clinic