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The Debate about n-6 Polyunsaturated Fatty Acid Recommendations for Cardiovascular Health
The dietetics profession has been guided by advances in science that are translated to clinical practice guidelines. Inherent to advancing practice is the ongoing scientific dialogue. Progress made in clinical practice reflects the evolution of ideas and opinions that are subjected to additional scientific experimentation to advance our understanding and resolve “debates.” A good example of ongoing dialogue is the discussion about n-6 polyunsaturated fatty acids (PUFAs) and heart health. The National Academies and the Dietary Guidelines Advisory Committee 2005 have recommended that PUFAs provide 5% to 10% of energy (1,2).You Are What You Eat Applies to Fish, Too
The health benefits of fish have long been touted based on their low fat content, excellent protein quality, and available micronutrients. Recently, calls for increased “oily fish” intake have been on the rise. Several large epidemiological investigations, as well as randomized clinical trials (1,2), have underscored the cardiovascular benefits of n-3 fatty acids (eicosapentaenoic acid [EPA] and docosahexaenoic acid [DHA]), nutrients found almost exclusively in seafood. The 2007 recommendations from the American Dietetic Association (ADA) and the Dietitians of Canada (DC) are the latest to join in a growing international chorus (3) specifying a healthful intake of EPA and DHA, now set at 500 mg/day.
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