Re: Re: Protein Restriction (methionine)

[Guest guest]

And you give up all the health benefits of fish, which have been posted here again and again. What does (NDB 15084) after the pink salmon mean? Ditto for the similar statement after the pinto beans?

on 5/31/2006 7:01 PM, citpeks at citpeks@... wrote:

Here is a table of the methionine content of various proteins

(percentage by weight).

3.6% egg white

2.9% pink salmon (NDB 15084)

2.8% chicken

2.7% casein

2.6% beef

1.9% whey

1.5% brewer's yeast

1.5% pinto beans (NDB 16044)

1.3% soy

The standard US Government diet of 2000 calories consists of 15%

protein, 30% fat, and 65% carbohydrates. The 15% protein corresponds

to 300 calories or 75 grams of protein.

By selecting pinto beans, soy, brewer's yeast and whey protein over

salmon, chicken, and eggs you reduce your consumption of methionine by

about one half.

Tony

[Guest guest]

On May 31, 2006, at 7:27 PM, Francesca Skelton wrote:

> And you give up all the health benefits of fish, which have been

> posted here again and again. What does (NDB 15084) after the pink

> salmon mean? Ditto for the similar statement after the pinto beans?

>

> on 5/31/2006 7:01 PM, citpeks at citpeks@... wrote:

>

> Here is a table of the methionine content of various proteins

> (percentage by weight).

>

> 3.6% egg white

> 2.9% pink salmon (NDB 15084)

> 2.8% chicken

> 2.7% casein

> 2.6% beef

> 1.9% whey

> 1.5% brewer's yeast

> 1.5% pinto beans (NDB 16044)

> 1.3% soy

Might NDB be short for NutritionData.com's database? (just

guessing). In any case the NutritionData.com website provides most

of the answers that bluestar61904 asks for re: methionine levels of

various foods.

re: fish, there was an informative article in the NYTimes the other

day about which of the most readily available varieties of fish can

be eaten, and how often (by adults, children, and infants), without

fear of excessive exposure to pollutants. The list of species which

can be eaten with confidence more than once a week is not very long,

and much depends on where the fish were caught (or farmed). If there

is interest I'll try posting the article as an html file.

L Cook

[Guest guest]

One of the prime sources of protein of the long-lived Okinawans is fish. So how does that square with this info? They also eat soy which would make sense (although many here won't touch soy because of various conflicting studies).

How do the diets of the Chinese and Japanese centenarians compare?

on 5/31/2006 7:01 PM, citpeks at citpeks@... wrote:

Here is a table of the methionine content of various proteins

(percentage by weight).

3.6% egg white

2.9% pink salmon (NDB 15084)

2.8% chicken

2.7% casein

2.6% beef

1.9% whey

1.5% brewer's yeast

1.5% pinto beans (NDB 16044)

1.3% soy

The standard US Government diet of 2000 calories consists of 15%

protein, 30% fat, and 65% carbohydrates. The 15% protein corresponds

to 300 calories or 75 grams of protein.

By selecting pinto beans, soy, brewer's yeast and whey protein over

salmon, chicken, and eggs you reduce your consumption of methionine by

about one half.

Tony

[Guest guest]

Rod: I always enjoy your deductions based on our current knowledge. However, as Tony likes to say, our current knowledge is lacking. Therefore of course, they are only guesses - as you admit. If we took every study posted at face value, we'd be eliminating: most protein, milk products, starches, soy, to mention just a few (I'm sure I've left many out) and now all the long list of foods containing methionine - or at least the ones with the most methionine. Not to mention of course, sugar, white flour and processed foods.

BTW where does milk protein and dairy stack up in the methionine equation?

Although you say below that fish is not the perfect food (and I don't think we have a perfect food yet), we have posted study after study touting its' benefits. But of course all things in moderation for sure.

It seems the bottom line is variety, variety, variety (as well as moderation of course :-))). I'm not giving up fish until I see more and better evidence.

on 6/1/2006 8:30 AM, Rodney at perspect1111@... wrote:

Hi Francesca:

The average okinawan only lives a few more years than the average

american, as we have previously discussed. But the long lived

japanese and chinese seem to eat an inordinate amount of dried sliced

sweet potatoes.

Certainly the japanese eat fish, two hundred grams a day of it on

average I recall (about twice as much as I eat). But there is no

specific mention of 'fish' in the chinese centenarian study

previously posted.

While fish seems to provide a clear net benefit, it is not god's gift

to nutrition. For a start high fat fish contain saturated fats in

addition to the presumed beneficial EPA and DHA, and that includes

the stuff with the worst reputation - myristic acid. Some people are

concerned with pollutants, although that issue seems to me to be

exaggerated based on the data I have seen.

Eating some fish, it appears, is healthier than eating no fish at

all. But presumably it would be even better to be able to eat fish

without the saturated fats and the methionine etc.. Eventually

(fifty years from now perhaps?) there will be farmed fish bred, or

genetically manipulated, for lower myristic acid and methionine

content. Perhaps even better, there may be fish oils refined to

contain only the EPA and DHA and/or any other components of fish

found to be beneficial.

But what we have seen so far as regards amino acids is just a couple

of studies, and methionine is just one amino acid. Maybe ten to

twenty years from now we will have data for the effects of all the

different amino acids that is comparable to the information we think

we have now for fats ............ but only from studies of flies

and mice.

In the meantime we each have to decide for ourselves where to place

our bets. We will not always make the winning bet. But that is in

the nature of making decisions based on inadequate information.

Rodney.