Re: Vegetable sources of Omega-3, vs fish.

This post not CC'd by email
On Fri, 24 Mar 2006 08:26:21 +0000, Chris Hogg <me@xxxxxxxxxxx>
wrote:

On Wed, 22 Mar 2006 07:43:15 +1200, Quentin Grady
<quentin@xxxxxxxxxxxxxxx> wrote:

<snip>

Fish eating isn't as strongly associated with decreased deaths by
cardiovascular disease as we'd like.

<snip>

The BBC News is carrying a story today saying that a review paper in
the current issue of the British Medical Journal of some 90 studies of
the effects of omega-3 oils on heart disease and cancer shows that
they aren't nearly as beneficial as had previously been suggested.
http://news.bbc.co.uk/1/hi/health/4838086.stm

It does make you wonder what to believe about dietary advice!

G'day G'day Chris,

I go to bed at nights wondering if my analysis of the literature is
correct. It was hard for me to accept that fish, particularly those
with high oil content was not the answer. There were all those lovely
mechanisms showing the longer chain omega-3 oils, EPA and DHA found in
fish being associated with the anti-inflammatory prostaglandins. It
was all very persuasive. It just didn't agree with the epidemiology
studies I had read if longevity was the desired endpoint.

One intriguing study was the one done on MEN which showed that eating
a small amount of fish or prawns per week reduced the risk ... then
there was a plateau. More wasn't better. With women it appeared to
be that the more fish the merrier. Prawns are not a good source of
omega-3 oils so something else made them beneficial. The evidence
has been there for a while but people have been running away from it.

Nutrition is filled with paradoxes and things that ought to be but
aren't. That occupies a chapter in my book.

Best wishes,
--
Quentin Grady ^ ^ /
New Zealand, >#,#< [
/ \ /\
"... and the blind dog was leading."

http://homepages.paradise.net.nz/quentin
.

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