@gollum,
Furthermore, an excerpt from Wikipedia:
"Although omega-3 fatty acids have been known as essential to normal growth and health since the 1930s, awareness of their health benefits has dramatically increased in the past few years. New versions of ethyl esterized omega-3 fatty acids, such as E-EPA and combinations of E-EPA and E-DHA, have drawn attention as highly purified and more effective products than the traditional ones. In the United States, these novel versions are often sold as prescription medications, such as Lovaza. In the European Union, they are available as dietary supplements.
The health benefits of the long-chain omega-3 fatty acids " DHA and EPA omega-3 " are the best known. These benefits were discovered in the 1970s by researchers studying the Greenland Inuit Tribe. The Greenland Inuit people consumed large amounts of fat from seafood, but displayed virtually no cardiovascular disease. The high level of omega-3 fatty acids consumed by the Inuit reduced triglycerides, heart rate, blood pressure, and atherosclerosis.
On September 8, 2004, the U.S. Food and Drug Administration gave "qualified health claim" status to EPA and DHA n??'3 fatty acids, stating that "supportive but not conclusive research shows that consumption of EPA and DHA [n??'3] fatty acids may reduce the risk of coronary heart disease."
This updated and modified their health risk advice letter of 2001. Currently, regulatory agencies do not accept that there is sufficient evidence for any of the other suggested benefits of DHA and EPA other than for cardiovascular health, and further claims should be treated with caution.
The Canadian Government has recognized the importance of DHA omega-3 and permits the following biological role claim for DHA: "DHA, an omega-3 fatty acid, supports the normal development of the brain, eyes and nerves."