are fish oil supplements good?

I think that fish oil probably contains a lot of toxic
materials, accumulated during the fish's life in the sea.
Extracting all those toxins would probably be a very
expensive operation. The benefit lies in the high amount
of omega 3 fatty acids. Personally I prefer organic flax
seed oil as a source of omega 3. Probably a lot less
toxic material.

Fred S. Netherlands

"Jill" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I just bought some sardine based fish oil supplements and
they recommend a few pills a day, for cholesterol
lowering. Now I am reading that too much can cause cancer,
especially stomach

cancer.

Quoted message said:

Also what about pcb and mercury and such

Would it be ok for me to take 1 every few days instead of
every day?

Thanks

Thanks where can I get the flax seed oil.? Thanks

"Fred S." <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I think that fish oil probably contains a lot of toxic
materials, accumulated during the fish's life in the sea.
Extracting all those toxins would probably be a very
expensive operation. The benefit lies in the high amount
of omega 3 fatty acids. Personally I prefer organic flax
seed oil as a source of omega 3. Probably

a

Quoted message said:

lot less toxic material.

Fred S. Netherlands

"Jill" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I just bought some sardine based fish oil supplements
and they recommend

a

Quoted message said:

Quoted message said:

few pills a day, for cholesterol lowering. Now I am
reading that too much can cause cancer, especially
stomach

cancer.

Quoted message said:

Also what about pcb and mercury and such

Would it be ok for me to take 1 every few days instead
of every day?

Thanks

Just use www.google.com and you'll probably find it.

"Jill" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Thanks where can I get the flax seed oil.? Thanks

Fred S. said:

I think that fish oil probably contains a lot of toxic
materials, accumulated during the fish's life in the sea.
Extracting all those toxins would probably be a very
expensive operation. The benefit lies in the high amount
of omega 3 fatty acids. Personally I prefer organic flax
seed oil as a source of omega 3. Probably a lot less toxic
material.

If you get cholesterol-free fish oil, all the pollutants
have been removed in the process that removes the
cholesterol.

However, analysis done by Consumer Reports labs showed
almost no pollutants in regular, with-cholesterol fish oil
capsules from major manufacturers.

--
- Laurel * * * amberdine.comamberdine.comOpen ↗

"Fred S." <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I think that fish oil probably contains a lot of toxic
materials

you 'think' it does...

Quoted message said:

accumulated during the fish's life in the sea. Extracting
all those toxins would probably be a very expensive
operation.

'would probably'...

Jeezes H. Christ!! What is it with you net-cretins? You
don't have the

know, the more bandwidth you waste!

people.

M.

Troll...

"Mark D." <[email hidden]> wrote in
message news:OaGdc.203$YA6.139@newsfe1-win...

Quoted message said:

"Fred S." <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I think that fish oil probably contains a lot of toxic
materials

you 'think' it does...

Quoted message said:

accumulated during the fish's life in the sea.
Extracting all

those toxins

Quoted message said:

Quoted message said:

would probably be a very expensive operation.

'would probably'...

Jeezes H. Christ!! What is it with you net-cretins? You
don't have

the

less you

Quoted message said:

know, the more bandwidth you waste!

other

Quoted message said:

people.

M.

Thanks for your "friendly" reaction. Off course I am not
claiming to know things for sure. Just my thoughts, but
maybe I can learn something along the way....

Fred

P.s. maybe you should cut down on the caffeine before people
get hurt :-))

"Mark D." <[email hidden]> wrote in
message news:OaGdc.203$YA6.139@newsfe1-win...

Quoted message said:

"Fred S." <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I think that fish oil probably contains a lot of toxic
materials

you 'think' it does...

Quoted message said:

accumulated during the fish's life in the sea.
Extracting all those

toxins

Quoted message said:

Quoted message said:

would probably be a very expensive operation.

'would probably'...

Jeezes H. Christ!! What is it with you net-cretins? You
don't have the

Quoted message said:

know, the more bandwidth you waste!

Quoted message said:

people.

M.

"Fred S." <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Thanks for your "friendly" reaction. Off course I am not
claiming to know things for sure. Just my thoughts,

but

Quoted message said:

maybe I can learn something along the way....

Keep your uninformed and misleading thoughts to your idiot
self. This is a sci.med group, and your delusional piffle
isn't welcome.

M.

Jill, apparently the omniscient guard dog of this group Mark
D. Bowles doesn't agree with me, but I stick to the organic
flax seed oil. It is a lot cheaper too. Here in Holland it
comes in bottles of half a liter for about US$2,50 Check
google to find more info.

Curious to see how Mark will be flaming me again.... He has
probably not seen his therapist for quite a while :-))

Fred

You aren't fond of freedom of speech? tsk tsk

"Mark D." <[email hidden]> wrote in
message news😄0Sdc.57$6e5.5@newsfe1-win...

Quoted message said:

"Fred S." <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Thanks for your "friendly" reaction. Off course I am not
claiming to know things for sure. Just my

thoughts,

Quoted message said:

but

Quoted message said:

maybe I can learn something along the way....

Keep your uninformed and misleading thoughts to your
idiot self.

This is a

Quoted message said:

sci.med group, and your delusional piffle isn't welcome.

M.

"Fred S." <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I think that fish oil probably contains a lot of toxic
materials, accumulated during the fish's life in the sea.
Extracting all those toxins would probably be a very
expensive operation.

The partitioning process that separates the oils from the
flesh also removes metals, so there is no risk from e.g.
mercury contained in fish oil. There isn't any. It is true
that fat-soluble toxicants may be present, however, and if
that concerns you, there are brands which have had virtually
all of those toxicants removed. The original question
related to sardine oil, and being very low in the food
chain, sardine oil would not carry a large risk of
contamination to begin with.

Quoted message said:

The benefit lies in the high amount of omega 3 fatty
acids.

Omega-3 fatty acids are not physiologically equivalent.

Quoted message said:

Personally I prefer organic flax seed oil as a source of
omega 3.

Flaxseed oil is a good source of the eighteen carbon ,
thrice desaturated fatty acid (18:3), alpha-linolenic
acid. It has long been believed that the body would simply
elongate and desaturate ALNA to produce the essential
fatty acids eicosapentaenoic acid (EPA, 20:5) and
docosahexaenoic acid
(22:6), but that has been shown to be a very inefficient
process altogether. Moreover, there is a gender
disparity, with women converting somewhat better than
men. If you are male, it is reasonable to presume
virtually zero conversion of ALNA to DHA (see
abstracts below). Even lactating females, presumably
in their most enzyme-induced state, do not form
appreciable levels of DHA from ALNA.

In short, there is no valid physiological substitute for
dietary DHA. You must obtain it from diet, preformed, if you
are male. (Quote from first abstract: "Since the capacity of
adult males to convert ALNA to DHA was either very low or
absent, uptake of pre-formed DHA from the diet may be
critical for maintaining adequate membrane DHA
concentrations in these individuals."😉 The most convenient
source is fish, but there are is at least one commercial
source of algae-derived DHA, called Neuromin.

Quoted message said:

Probably a lot less toxic material.

If the flax was not sprayed with pesticides, I suppose.

Quoted message said:

Fred S. Netherlands

Lar

Br J Nutr. 2002 Oct;88(4):355-63. Related
Articles, Links

Comment in:
a.. Br J Nutr. 2003 May;89(5):739-40.
b.. Br J Nutr. 2003 Nov;90(5):993-4; discussion 994-5.

Eicosapentaenoic and docosapentaenoic acids are the
principal products of alpha-linolenic acid metabolism in
young men*.

Burdge GC, Jones AE, Wootton SA.

Institute of Human Nutrition, Level C, West Wing,
Southampton General Hospital, Tremona Road, Southampton,
SO16 6YD, UK. [email hidden]

The capacity for conversion of alpha-linolenic acid (ALNA)
to n-3 long-chain polyunsaturated fatty acids was
investigated in young men. Emulsified [U-13C]ALNA was
administered orally with a mixed meal to six subjects
consuming their habitual diet. Approximately 33 % of
administered [13C]ALNA was recovered as 13CO2 on breath over
the first 24 h. [13C]ALNA was mobilised from enterocytes
primarily as chylomicron triacylglycerol (TAG), while
[13C]ALNA incorporation into plasma phosphatidylcholine (PC)
occurred later, probably by the liver. The time scale of
conversion of [13C]ALNA to eicosapentaenoic acid (EPA) and
docosapentaenoic acid (DPA) suggested that the liver was the
principal site of ALNA desaturation and elongation, although
there was some indication of EPA and DPA synthesis by
enterocytes. [13C]EPA and [13C]DPA concentrations were
greater in plasma PC than TAG, and were present in the
circulation for up to 7 and 14 d, respectively. There was no
apparent 13C enrichment of docosahexaenoic acid (DHA) in
plasma PC, TAG or non-esterified fatty acids at any time
point measured up to 21 d. This pattern of 13C n-3 fatty
acid labelling suggests inhibition or restriction of DHA
synthesis downstream of DPA. [13C]ALNA, [13C]EPA and
[13C]DPA were incorporated into erythrocyte PC, but not
phosphatidylethanolamine, suggesting uptake of intact plasma
PC molecules from lipoproteins into erythrocyte membranes.
Since the capacity of adult males to convert ALNA to DHA was
either very low or absent, uptake of pre-formed DHA from the
diet may be critical for maintaining adequate membrane DHA
concentrations in these individuals.

Br J Nutr. 2002 Oct;88(4):411-20. Related
Articles, Links

Comment in:
c.. Br J Nutr. 2003 Nov;90(5):993-4; discussion 994-5.

Conversion of alpha-linolenic acid to eicosapentaenoic,
docosapentaenoic and docosahexaenoic acids in young women.

Burdge GC, Wootton SA.

Institute of Human Nutrition, University of Southampton,
Southampton, UK.
[email hidden]

The extent to which women of reproductive age are able to
convert the n-3 fatty acid alpha-linolenic acid (ALNA) to
eicosapentaenoic acid (EPA), docosapentaenoic acid (DPA) and
docosahexaenoic acid (DHA) was investigated in vivo by
measuring the concentrations of labelled fatty acids in
plasma for 21 d following the ingestion of [U-13C]ALNA (700
mg). [13C]ALNA excursion was greatest in cholesteryl ester
(CE) (224 (sem 70) micromol/l over 21 d) compared with
triacylglycerol (9-fold), non-esterified fatty acids (37-
fold) and phosphatidylcholine (PC, 7-fold). EPA excursion
was similar in both PC (42 (sem 8) micromol/l) and CE (42
(sem 9) micromol/l) over 21 d. In contrast both [13C]DPA and
[13C]DHA were detected predominately in PC (18 (sem 4) and
27 (sem 7) micromol/l over 21 d, respectively). Estimated
net fractional ALNA inter-conversion was EPA 21 %, DPA 6 %
and DHA 9 %. Approximately 22 % of administered [13C]ALNA
was recovered as 13CO2 on breath over the first 24 h of the
study. These results suggest differential partitioning of
ALNA, EPA and DHA between plasma lipid classes, which may
facilitate targeting of individual n-3 fatty acids to
specific tissues. Comparison with previous studies suggests
that women may possess a greater capacity for ALNA
conversion than men. Such metabolic capacity may be
important for meeting the demands of the fetus and neonate
for DHA during pregnancy and lactation. Differences in DHA
status between women both in the non-pregnant state and in
pregnancy may reflect variations in metabolic capacity for
DHA synthesis.

Am J Clin Nutr. 2003 Jan;77(1):226-33. Related
Articles, Links

Erratum in:
d.. Am J Clin Nutr. 2003 Oct;78(4):806.

Supplementing lactating women with flaxseed oil does not
increase docosahexaenoic acid in their milk.

Francois CA, Connor SL, Bolewicz LC, Connor WE.

Division of Endocrinology, Metabolism and Clinical
Nutrition, the Department of Medicine, Oregon Health and
Science University, Portland 97239-3098, USA.

BACKGROUND: Flaxseed oil is a rich source of 18:3n-3 (alpha-
linolenic acid, or ALA), which is ultimately converted to
22:6n-3 (docosahexaenoic acid, or DHA), a fatty acid
important for the development of the infant brain and
retina. OBJECTIVE: The objective of this study was to
determine the effect of flaxseed oil supplementation on the
breast-milk, plasma, and erythrocyte contents of DHA and
other n-3 fatty acids in lactating women. DESIGN: Seven
women took 20 g flaxseed oil (10.7 g ALA) daily for 4 wk.
Breast-milk and blood samples were collected weekly before,
during, and after supplementation and were analyzed for
fatty acid composition. RESULTS: Breast milk, plasma, and
erythrocyte ALA increased significantly over time (P <
0.001) and after 2 and 4 wk of supplementation (P < 0.05).
Over time,
20:5n-3 (eicosapentaenoic acid, or EPA) increased
significantly in breast
milk (P= 0.004) and in plasma (P < 0.001). In addition,
plasma EPA increased significantly (P < 0.05) after
2 and 4 wk of supplementation. There were
significant increases over time in breast-milk 22:5n-
3 (docosapentaenoic acid, or DPA) (P < 0.02), plasma
DPA (P < 0.001), and erythrocyte DPA (P < 0.01). No
significant changes were observed in breast-milk,
plasma, or erythrocyte DHA contents after flaxseed
oil suppleme ntation. CONCLUSIONS: Dietary flaxseed
oil increased the breast-milk, plasma, and
erythrocyte contents of the n-3 fatty acids ALA,
EPA, and DPA but had no effect on breast-milk,
plasma, or erythrocyte DHA contents.

On Fri, 09 Apr 2004 11:56:51 GMT, "Jill" <[email hidden]>
posted:

Quoted message said:

I just bought some sardine based fish oil supplements and
they recommend a few pills a day, for cholesterol lowering.
Now I am reading that too much can cause cancer, especially
stomach cancer.

Also what about pcb and mercury and such

Would it be ok for me to take 1 every few days instead of
every day?

How about trying more exercise, less food and what you do
eat to consist of a wide variety of wholefoods?

On Fri, 09 Apr 2004 12:57:07 GMT, "Fred S."
<[email hidden]> posted:

Quoted message said:

I think that fish oil probably contains a lot of toxic
materials, accumulated during the fish's life in the sea.

Not applicable to sardines... They only eat plankton.

Quoted message said:

Extracting all those toxins would probably be a very
expensive operation.

None in sardines.

Quoted message said:

The benefit lies in the high amount of omega 3 fatty acids.
Personally I prefer organic flax seed oil as a source of
omega 3. Probably a lot less toxic material.

And probably not. Organic is fine so long as it is as
readily available and as cheap or cheaper than any other.
Otherwise it is just a con.

On Sat, 10 Apr 2004 00:19:19 +0100, "Mark D."
<[email hidden]> posted:

Quoted message said:

"Fred S." <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I think that fish oil probably contains a lot of toxic
materials

you 'think' it does...

Quoted message said:

accumulated during the fish's life in the sea. Extracting
all those toxins would probably be a very expensive
operation.

'would probably'...

Jeezes H. Christ!! What is it with you net-cretins? You
don't have the

Quoted message said:

know, the more bandwidth you waste!

Quoted message said:

people.

You sound like you sell something, Mark....

"Moosh🙂" <[email hidden]> wrote or quoted:

Quoted message said:

"Fred S." <[email hidden]> posted:

Quoted message said:

Quoted message said:

I think that fish oil probably contains a lot of toxic
materials, accumulated during the fish's life in the sea.

Not applicable to sardines... They only eat plankton.

Nonsense. Along with many other things, they eat other
small fish.
--
__________
|im |yler timtyler.orgtimtyler.orgOpen ↗ [email hidden] Remove
lock to reply.

Larry Hoover <[email hidden]> wrote or quoted:

Quoted message said:

Flaxseed oil is a good source of the eighteen carbon ,
thrice desaturated fatty acid (18:3), alpha-linolenic
acid. It has long been believed that the body would simply
elongate and desaturate ALNA to produce the essential
fatty acids eicosapentaenoic acid (EPA, 20:5) and
docosahexaenoic acid
(22:6), but that has been shown to be a very inefficient
process altogether. Moreover, there is a gender
disparity, with women converting somewhat better
than men. If you are male, it is reasonable to
presume virtually zero conversion of ALNA to DHA
(see abstracts below). Even lactating females,
presumably in their most enzyme-induced state, do
not form appreciable levels of DHA from ALNA.

In short, there is no valid physiological substitute for
dietary DHA. You must obtain it from diet, preformed, if
you are male. (Quote from first abstract:

[i.e. from Eicosapentaenoic and docosapentaenoic acids are
the principal products of alpha-linolenic acid
metabolism in young men
"]http://calorierestriction.org/pmid/?n=12323085]

Quoted message said:

"Since the capacity of adult males to convert ALNA to DHA
was either very low or absent, uptake of pre-formed DHA
from the diet may be critical for maintaining adequate
membrane DHA concentrations in these individuals."😉 [...]

It is not clear how they think they can draw that
conclusion.

It seems there was no attempt to make the men in their study
deficient in DHA - indeed they fed them their normal diet.

Consequently, you would think that all they can say is that
they did not see the conversion taking place - not that
there was a "low capacity" for it happening.

However:

[1] Is docosahexaenoic acid (DHA) essential? Lessons from
DHA status regulation, our ancient diet, epidemiology
and randomized controlled trials.
calorierestriction.orgpmidOpen ↗

[2] beyondveg.comcompOpen ↗
anat-7i.shtml

[3] Can adults adequately convert alpha-linolenic acid (18:3n-
3) to eicosapentaenoic acid (20:5n-3) and
docosahexaenoic acid (22:6n-3)?
- calorierestriction.orgpmidOpen ↗

...also express some scepticism about whether DHA synthesis
by the body is optimal - or even adequate.
--
__________
|im |yler timtyler.orgtimtyler.orgOpen ↗ [email hidden] Remove
lock to reply.

On Sun, 11 Apr 2004 20:16:44 GMT, Tim Tyler <[email hidden]> posted:

Quoted message said:

"Moosh🙂" <[email hidden]> wrote or quoted:

Quoted message said:

"Fred S." <[email hidden]> posted:

Quoted message said:

Quoted message said:

I think that fish oil probably contains a lot of
toxic materials, accumulated during the fish's life
in the sea.

Not applicable to sardines... They only eat plankton.

Nonsense. Along with many other things, they eat other
small fish.

Pilchards eat planktonic crustaceans, mollusc larvae and
phytoplankton. In turn, they are also important as a staple
food for other marine life, including tuna, salmon, sea-
birds (including penguins),sharks and dolphins.

From:
fish.wa.gov.aupilcm01.htmlOpen ↗

"Moosh🙂" <[email hidden]> wrote or quoted:

Quoted message said:

On Sun, 11 Apr 2004 20:16:44 GMT, Tim Tyler
<[email hidden]> posted:

Quoted message said:

"Moosh🙂" <[email hidden]> wrote or quoted:

Quoted message said:

"Fred S." <[email hidden]> posted:

Quoted message said:

Quoted message said:

Quoted message said:

>I think that fish oil probably contains a lot of toxic
>materials, accumulated during the fish's life in the
>sea.

Not applicable to sardines... They only eat plankton.

Nonsense. Along with many other things, they eat other
small fish.

Pilchards eat planktonic crustaceans, mollusc larvae and
phytoplankton. In turn, they are also important as a
staple food for other marine life, including tuna, salmon,
sea-birds (including penguins),sharks and dolphins.

From: fish.wa.gov.aupilcOpen ↗
m01.html

"sardines eat minnows"

- greenscreen.orgBRCSfoodOpen ↗
chain.html

They also eat eggs and other small marine animals - it is
inaccurate to claim that they only eat plankton.
--
__________
|im |yler timtyler.orgtimtyler.orgOpen ↗ [email hidden] Remove
lock to reply.

On Sat, 17 Apr 2004 08:20:56 GMT, Tim Tyler <[email hidden]> posted:

Quoted message said:

"Moosh🙂" <[email hidden]> wrote or quoted:

Quoted message said:

On Sun, 11 Apr 2004 20:16:44 GMT, Tim Tyler
<[email hidden]> posted:

Quoted message said:

"Moosh🙂" <[email hidden]> wrote or quoted:
>"Fred S." <[email hidden]> posted:

Quoted message said:

Quoted message said:

> >I think that fish oil probably contains a lot of
> >toxic materials, accumulated during the fish's life
> >in the sea.
>
> Not applicable to sardines... They only eat plankton.

Nonsense. Along with many other things, they eat other
small fish.

Pilchards eat planktonic crustaceans, mollusc larvae and
phytoplankton. In turn, they are also important as a
staple food for other marine life, including tuna,
salmon, sea-birds (including penguins),sharks and
dolphins.

From: fish.wa.gov.aupilcOpen ↗
m01.html

"sardines eat minnows"

- greenscreen.orgBRCSfoodcOpen ↗
hain.html

Is that the best you can do? "Nature News For Kids By Kids?

Quoted message said:

They also eat eggs and other small marine animals - it is
inaccurate to claim that they only eat plankton.

What is plankton? Are you being argumentative for the sake
of it? What point are you trying to make?