LA, ALA and everythiung else are by getting a blood test. You find out
what's available using Google... for example there is a home test kit
available here
http://www.healthtestingathome.com/index.asp?PageAction=VIEWPROD&ProdID=98
no idea if it is any good -- just an example.
That said, in response to Frank's response...
Conversion of ALA is much lower than people seem to think -- less than 10%
to EPA and between 0-4% to DHA (Williams and Burdge 2006); there are similar
studies using radioactive tracers to track the conversion and it is always
really low.
So personally it makes no sense to me to be loading up with EPA and DHA
supplements like fish oil in the relatively massive doses currently being
advised; if you do that you are just guessing what your body needs. I don't
believe, for instance, that human beings evolved to drink fish oil every
day.
Why not get a test first and see if you actually need to be doing it, or
whether there are other ways of correcting matters?
I also question whether older people do in fact lose the ability to make the
enzymes. All the research on this seems to have been done in rats, and while
rodents' EFA metabolism is just like humans, they don't live very long, so I
thnk the results are questionable.
Given that the conversion rate for ALA to DHA in healthy men has been found
in studies to be at or near 0%, it is difficult to see how this could get
any worse with age :) In women, research has shown that desaturase activity
(converions) does NOT decline with age. What is known for sure is that the
conversion rate varies and the body has to be trusted to convert what it
needs, when it needs it, in the quantities it alone knows it needs. It is
much more important to focus on getting a regular supply of high-quality,
unprocessed, highly bioavailable essential fatty acids -- ALA and LA.
*In my opinion* it is more likely that the problem lies in the upstream
supply: in other words, they are lacking a supply of good quality,
bioavailable LA and ALA in the diet. Most people are also suffering the
effects of a chronic overdosing of trans-fatty acids from processed and
heated oils as well.
In addition deficiencies in nutrients such as B6 also reduces the ability to
convert (or so the rates tell us) :)
Simon.
----- Original Message -----
From: <FrankCuns-Rial@comcast.net>
Hi, To convert ALA into DHA and EPA one needs wholesome amounts of Alpha-5
> Desaturase and Elongase two enzymes manufactured mainly in the liver. As
> we age, the capacity of the liver (mostly due to overloading with toxins)
> diminishes. Some people by the time to become 50 years old have lost their
> ability to produce these complex enzymes, or whatever little they are
> still producing is being used by the body for more important tasks.
> That is the reason why it is so advisable to take the EPA and DHA
> supplements.
>
> Regards, Frank ND
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