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What are DHA and EPA Omega-3 Fatty Acids?

By Mark Stibich, Ph.D., About.com

Updated: January 03, 2008

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Definition: Omega-3s are also known as essential fatty acids. These are substances that the body needs (essential) but cannot produce itself. You must get your omega-3s from food. The two most important omega-3s are EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). Research has shown that increasing the levels of these two omega-3s can improve cardiovascular health and even protect the brain from some of the effects of aging.

It has long been known that the Japanese people living on the island of Okinawa have the longest lifespan in the world. One of the reasons for this is diet, specifically eating lots of fish. What is so great about fish? Not only are they a great source of lean protein, they contain omega-3 fatty acids.

How Do I Get My Omega-3s?

You can take supplements or (better) be sure to get a couple of servings of fatty fish each week. When choosing fish, look for types that are low in mercury like fresh salmon.

FYI

The -3 in the word omega-3 refers to the chemical structure of these fatty acids. The -3 indicates where the first double bond appears and the omega tells which end you are counting from.
Also Known As: fish oils

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