Wednesday, January 31, 2007

Omega-3's and Death


The ultimate test with any supplement or dietary protocol is as follows: Does the change make sense both from a scientific standpoint and more important, does it make sense at the dinner table. Therefore, based upon the consumption of Omega-3 fats, obviously the focus of these latest blogs, does consuming Omega-3 fats impart such a health benefit that we should all consider taking them?

Numerous alternative approaches to diet have espoused the magic of Omega-3’s. Mainstream medicine has found them efficacious in one setting: Preventing sudden cardiac death. Many, many other associations are being studied. If one simple supplement or diet management technique appears to be a panacea for all that ails us, Omega-3’s have apparently become a candidate.

There are really only three Omega-3’s to keep in mind:

1. Linolenic Acid: 18 carbons: 3 double bonds: found in flaxseed oil, walnut oil, canola oil and as a supplement.
2. Eicosapentanoic Acid: (EPA) 20 carbons: 5 double bonds: found in seafood, and as a supplement
3. Docosahexanoic Acid: (DHA) 22 carbons: 6 double bonds: found in seafood, and as a supplement

The question naturally arising from an examination of the above fatty acids is: Can the α-linolenic acid in the above foods, namely, flaxseed oil or walnut oil, be elongated and have two more double bonds added to make EPA and eventually DHA? Biochemically, the human body has the enzymes and machinery to do just that. A bigger question and one without a solid answer is: How much of consumed α-linolenic is converted to DHA and EPA? Is α-linolenic acid totally, partially or never converted to DHA and EPA? Can anyone take α-linolenic acid and not have to put up with fish oil and still achieve the same result in terms of a decrease in the risk of sudden cardiac death?

The short answer and reiterating yesterday’s blog is: It appears to depend on your gender. Women apparently convert a greater percentage of α-linolenic acid to the larger DHA and EPA than men do. Speculation has it that a woman’s hormonal environment favors that conversion and a man’s doesn’t. Why do we care so much about the conversion of α-linolenic acid to DHA and EPA? Stay tuned.

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A Point of View

Modern Western society is awash in a sea of food affluence. For many of us, from the moment we arise in the morning to the time we fall asleep at night, the one rhythmic pattern occurring daily with anticipated consistency is food intake—and in many cases very high quality food intake. Even the smallest of excess calories consumed daily translates over time to excess energy being stored as fat in adipose tissue. ______________________________________ Overeating has become the symptom of a cultural disease associated with conditioned food intake, not a mystical physiologic process involving genes gone wild. From one diet manual to the next, the book offerings to navigate this mess are fancied up versions of the same old thing, eventually returning the dieter to a conditioned system of eating behavior. The contention of this blog, is it's time to get off the merry-go-round of dieting and learn the ABC's of basic nutritional science. Teach your children what they need to know to navigate the gauntlet of foods in the 21st century. We encourage any experts in the field to contribute.

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