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Fuhrman email - DHA and vegans
 
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Published: 15 y
 

Fuhrman email - DHA and vegans


I just got an email newsletter from Dr Fuhrman, I pasted it below. I have deleted the part advertising his DHA supplement, because I think supplements are not necessary. However it does make me wonder if our bodies have not entirely adapted to a vegan diet.

Here's a google search http://www.google.com/search?q=dha+vegan

Of course, the problem is we have messed up the planet, and fish now contains heavy metals, so you can't win.

I guess it's a matter of making your personal choice of which is the lesser evil.

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What Vegans May Be Missing

Certainly a plant-based diet which minimizes animal products is the best approach for losing weight, preventing and reversing disease, and optimizing health. However, those following a vegetarian or vegan diet, and those not consuming fatty fish like salmon each week, should be aware of recent studies that suggest they may be deficient in a critical and essential nutrient - especially EPA & DHA the long-chain omega-3 fatty acids.

Alpha-linolenic acid (ALA) is an omega-3 fat and is the precursor of the longer chain omega 3 fats eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) - ie EPA and to a lesser extent DHA can be made in the body from ALA. Primary sources of these fatty acids are certain fish and seafood.

As a result, vegetarian, and especially vegan, diets provide little EPA and DHA directly. A recent study reviewed the varying dietary fat intake across vegetarians, vegans, omnivores, and semi-omnivores and its impact on essential omega-3 fatty acid availability in tissues. It concluded that vegetarians were left with reduced levels of omega-3 and recommended that they consume additional direct sources of EPA and DHA, regardless of age or gender, for physical, mental and neurological health benefits.1

In addition, ALA, EPA, and DHA are especially important for the prevention of certain cancers, particularly those of the breast and colon, and possibly of the uterus and the skin, and are likely to reduce the risk of postpartum depression, manic-depressive psychosis, dementias, Parkinson's, hypertension, toxemia, diabetes, and to a certain extent, age-related macular degeneration.2

Although vegetarian diets are generally lower in total fat, saturated fat, and cholesterol than are non-vegetarian diets and may appear to offer cardiovascular health benefits due to higher intakes of antioxidants and fiber, the lack of direct EPA or DHA dietary sources may cause an adverse effect.3,4

With all of this documented research, it is not surprising that when I draw blood for fatty acid analysis on many of my patients, I find that a large percentage of individuals who do not eat fish or seafood regularly do not have optimal levels of DHA - even those using walnuts and flaxseeds on a regular basis. I often see patients eating otherwise excellent diets with itchy dry skin, seborrheac dermatitis and other signs of DHA deficiency.

Although, there are some vegans and vegetarians regularly consuming walnuts and flaxseeds (which supply adequate ALA) may produce enough DHA on their own and may not require supplementation. However, because this issue is so imperative to their health it should be confirmed with a blood test before assuming that the conversion level is adequate. In order to assure optimal production of DHA fat, without recommending that the consumption of fish or refined fish oils, I recommend taking a vegetable sourced DHA supplement. DHA alone can deliver the same benefits of fish oil, since the intake of DHA can cause a natural retro-conversion to EPA internally.

Laboratory cultivated DHA is made from microalgae and is a pure form of DHA without environmental contamination. It is grown in the laboratory, not collected in the wild. It has no mercury or other toxins, which is a concern even for non-vegans who are cautious about eating fish or seafood.

DHA has been shown to protect against dementia, depression, inflammatory diseases, attention deficit and hyperactivity disorder (ADHD), allergies, and to offer significant benefits for overall cardiovascular health.

There are other problems with consuming fish oils. The main problem is that the fat turns rancid as it sits on store shelves. As a result, many people complain of burping, indigestion, a foul taste, and long lasting fish breath. I have also observed that rancidity of this fish fat can place a stress on the liver. Patients of mine have had blood tests showing abnormal liver function when consuming fish oil in significant amounts and then have had these tests return to normal when the fish oils were stopped. [cropped]
 

 
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