Re: Linoleic acid a carcinogen?

John Sankey wrote:
:: Although montygram's views on PUFAs are extreme, I personally back
:: his statement that omega-6 PUFAs are undesirable in a human diet.

This recently posted study implies that increasing polyunsaturated fats is
also acceptable (not ideal).

"*What this study adds*
[...]
Polyunsaturated lipids are an acceptable substitute when monounsaturated
lipids are not readily available"

http://bmj.bmjjournals.com/cgi/content/full/330/7498/991

http://bmj.bmjjournals.com/cgi/content/full/330/7498/991/TBL4

:: Omega-3 PUFAs are a totally different matter. Whether they can be
:: found to be carcinogenic or not, whether they peroxidize or not, is
:: irrelevant. They are essential to the operation of human brains.

Especially DHA seems to be important.

:: For me the question is: how much omega-3 do we need as adults to
:: maintain our brains? I haven't yet seen a quantitative study of that
:: question that I trust. Until then, I shall make sure I consume a
:: significant quantity of them.
:: (cf. http://sankey.ws/dietref.html)

--
Juhana

On 15 Jun 2005 09:19:50 GMT, [email hidden] (John Sankey)

Quoted message said:

Although montygram's views on PUFAs are extreme, I personally back
his statement that omega-6 PUFAs are undesirable in a human diet.

Omega-3 PUFAs are a totally different matter. Whether they can be
found to be carcinogenic or not, whether they peroxidize or not, is
irrelevant. They are essential to the operation of human brains.

For me the question is: how much omega-3 do we need as adults to
maintain our brains? I haven't yet seen a quantitative study of that
question that I trust. Until then, I shall make sure I consume a
significant quantity of them.
(cf. http://sankey.ws/dietref.html)

Would omega-3 PUFAs from flax seed be preferred over fish or does it
matter?

rr

Roger Rabbit wrote:
:: On 15 Jun 2005 09:19:50 GMT, [email hidden] (John Sankey)
:: wrote:
::
:::
::: Although montygram's views on PUFAs are extreme, I personally back
::: his statement that omega-6 PUFAs are undesirable in a human diet.
:::
::: Omega-3 PUFAs are a totally different matter. Whether they can be
::: found to be carcinogenic or not, whether they peroxidize or not, is
::: irrelevant. They are essential to the operation of human brains.
:::
::: For me the question is: how much omega-3 do we need as adults to
::: maintain our brains? I haven't yet seen a quantitative study of that
::: question that I trust. Until then, I shall make sure I consume a
::: significant quantity of them.
::: (cf. http://sankey.ws/dietref.html)
::
:: Would omega-3 PUFAs from flax seed be preferred over fish or does it
:: matter?

It does matter. I think that it is ideal to get *both* alpha-linolenic acid
from plant sources and EPA, DHA and DPA from fatty fish or fish oils. The
elongation does not work very well (especially from EPA to DHA), and so it
is good to include the long chain fatty acids to diet as well. For men, the
non-extracted sources of alpha-linolenic acid are better as alpha-linolenic
acid has been associated with increased prostate cancer. So its is better
for men to eat some walnuts or flax seeds than to use flax seed oil.

--
Juhana

Juhana Harju said:

Roger Rabbit wrote:
::
:: Would omega-3 PUFAs from flax seed be preferred over fish or does it
:: matter?

It does matter. I think that it is ideal to get *both* alpha-linolenic acid
from plant sources and EPA, DHA and DPA from fatty fish or fish oils. The
elongation does not work very well (especially from EPA to DHA), and so it
is good to include the long chain fatty acids to diet as well. For men, the
non-extracted sources of alpha-linolenic acid are better as alpha-linolenic
acid has been associated with increased prostate cancer. So its is better
for men to eat some walnuts or flax seeds than to use flax seed oil.

Thank for the info.

rr