Raw oysters?

About (not) consuming fresh raw fish and fresh raw egg yolks
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RRM
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Post by RRM »

Kookaburra wrote:Do oysters need to be rinsed with water prior to eating?
Yes, that way you rinse off the salt water.
Kookaburra wrote:You mean the amount of zinc in an oyster is not fixed?
Not fixed at all, indeed.
Thats true for all nutrients in all foods,
but this one is very extreme.
how do I know how much zinc I have ingested?
You dont.
How much copper is considered too much?
dont worry about the copper, in comparison to the zinc.
Kookaburra wrote:why is it okay to drink lots of orange juice every day, with the total amount of vitamin C being about 39 times more than the recommended RDA level but not oysters?
If you would eat them every day, the body would adjust accordingly.
The extra zinc taken up will be excreted via urine and sweat, as it is water soluble.
Yes, but that is AFTER it has been 'floating around' in the blood.
If you are not used to eating oysters very regularly, the body will not be that effective in taking up very little of all the available zinc.
shouldn't the extreme amounts of zinc in oysters not be a problem at all?
We cant say that, because it depends on the conditions,
and thats why im urging you to be careful.
Im not saying that you shouldnt eat them.
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Post by Kookaburra »

RRM wrote:
Kookaburra wrote:You mean the amount of zinc in an oyster is not fixed?
Not fixed at all, indeed.
Thats true for all nutrients in all foods,
but this one is very extreme.
I went to the USDA database. 100g of Pacific raw oysters contain 16.62mg of zinc. Why is it fixed in the USDA database?
Kookaburra wrote:The extra zinc taken up will be excreted via urine and sweat, as it is water soluble.

Yes, but that is AFTER it has been 'floating around' in the blood.
If you are not used to eating oysters very regularly, the body will not be that effective in taking up very little of all the available zinc.
What do you mean by 'floating around' in the blood? Can't the same be said for vitamin C from orange juice?

Kookaburra wrote:shouldn't the extreme amounts of zinc in oysters not be a problem at all?

We cant say that, because it depends on the conditions,
and thats why im urging you to be careful.
Im not saying that you shouldnt eat them.
Its just that last Tuesday I bought 2 dozens of oysters. I initially wanted only a dozen but somehow I got talked by the lady owner into buying another. They cost me $25. I do not want to waste them, so is it okay to eat 3 oysters every day for the next 8 days as animal food? After that, I will be going back to raw salmon. I got to say, raw oysters are not too bad at all although they melt in my mouth too fast!
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Post by RRM »

Kookaburra wrote: I went to the USDA database. 100g of Pacific raw oysters contain 16.62mg of zinc. Why is it fixed in the USDA database?
Because its an average.
In Souci, SW et al, Food Composition and Nutrition Tabels,
they provide both the range (min-max) as well as average.
Kookaburra wrote:
RRM wrote:
Kookaburra wrote:The extra zinc taken up will be excreted via urine and sweat, as it is water soluble.
Yes, but that is AFTER it has been 'floating around' in the blood.
If you are not used to eating oysters very regularly, the body will not be that effective in taking up very little of all the available zinc.
What do you mean by 'floating around' in the blood? Can't the same be said for vitamin C from orange juice?
I drink so much oj on a daily basis,
that my digestive/uptake system is very much trained to stop most of the vitamin C from entering my blood,
so that it never makes it to the blood.

Kookaburra wrote: is it okay to eat 3 oysters every day for the next 8 days as animal food?
I dont know; it depends on how high the actual zinc levels are
and on how fast your uptake system can adapt.
Why dont you put them in the freezer? (not all in one sack, but portions of 3)
Then you can consume them whenever you feel like.
raw oysters are not too bad at all although they melt in my mouth too fast!
I think they are delicious indeed.
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Post by Kookaburra »

What is the website for Souci, SW et al, Food Composition and Nutrition Tabels? Actually, what's wrong if the zinc is 'floating in the blood'? I thought that unlike calcium, they can't be stored? So, isn't it a matter of time before the excess are excreted out?
Why dont you put them in the freezer? (not all in one sack, but portions of 3)
Will putting them in the freezer affect the taste? Why can't I put them all in one sack?
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Post by RRM »

Kookaburra wrote:What is the website for Souci, SW et al, Food Composition and Nutrition Tabels?
There is no.
You can only buy the printed book.
Actually, what's wrong if the zinc is 'floating in the blood'?
Whats wrong with temporarily elevated blood zinc levels?
From http://www.youngerthanyourage.com/3/index.html
"Too much of metals like iron, copper, cobalt, manganese and zinc is pro-oxidative (1),
damaging nutrients, arteries (2) messenger-substances, cell-DNA (3) and enzymes (4),
increases hart attack risk, and can cause diabetes (5), colon cancer (6) Parkinson's disease (7) and infertility. (8 )"
isn't it a matter of time before the excess are excreted out?
Yes, a matter of time.
The more time, the more damage.
Will putting them in the freezer affect the taste?
A little bit, but not much.
Why can't I put them all in one sack?
Because you then have to defrost them all at the same time.
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Post by Aytundra »

RRM wrote: Wed 05 May 2010 08:18
Kookaburra wrote:What is the website for Souci, SW et al, Food Composition and Nutrition Tabels?
There is no.
You can only buy the printed book.
Any other books you have on your shelf that are good for reading? ;)
Any must reads?
Suggestions?

Hurry!
I have access to a (small) school library for a limited time (graduating), and I want to find all the expensive books, {as many as I can find ... :twisted: revenge for the tuition that was too expensive imo :roll: }.
A tundra where will we be without trees? Thannnks!
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Oscar
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Re: Raw oysters?

Post by Oscar »

A biochemistry book? For example "Principles of Biochemistry" by Lehninger, though it's a bit old.
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Re: Raw oysters?

Post by RRM »

Oscar wrote: Sat 26 Aug 2017 10:46 A biochemistry book? For example "Principles of Biochemistry" by Lehninger, though it's a bit old.
Yes, that one helped me a lot,
i think the latest version is the 7th edition
Souci et al are also online since 1995, though access was always restricted.
You can get a subscription, but since the USDA Nutrient Database is free...
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