Re: Vitamin A Content in Various Animal Livers

[Guest guest]

> Check out this chart on a website I mentioned earlier:

>

> http://www.serve.com/BatonRouge/nutrition/animal_livers.htm

>

> All the samples appear to be from European livestock - does anyone

know what

> they are feeding livestock in the various European countries? It

made me

> think...would *grain*-fed or *grass*-fed livestock have more vitamin

A

> stored in the liver? I'm inclined to think grass-fed due to the high

beta

> carotene content in grass. But, not all beta carotene is necessarily

> converted to vitamin A. But I can't think of where grain-fed

livestock would

> get much vit A or its precursors...

>

> Thoughts? Comments?

Suzi, We test Vit A here in the lab almost daily on flour. I'll have

to find a procedure to test chicken livers from our farm. Our

chickens are consuming lots of fast growing green grass and worms and

bugs as well. The liver from my chicken last week " appeared " to

have " lots and lots " of yellow coloring within it. And the organ fat

was very bright yellow. That is not objective evaluation but until we

find a procedure and get a test ran that's all I can do. Dennis

>

> Suze Fisher

> Web Design & Development

> http://members.bellatlantic.net/~vze3shjg/

> mailto:s.fisher22@v...

[Guest guest]

> > Check out this chart on a website I mentioned earlier:

> >

> > http://www.serve.com/BatonRouge/nutrition/animal_livers.htm

> >

> > All the samples appear to be from European livestock - does anyone

> know what

> > they are feeding livestock in the various European countries? It

> made me

> > think...would *grain*-fed or *grass*-fed livestock have more

vitamin

> A

> > stored in the liver? I'm inclined to think grass-fed due to the

high

> beta

> > carotene content in grass. But, not all beta carotene is

necessarily

> > converted to vitamin A. But I can't think of where grain-fed

> livestock would

> > get much vit A or its precursors...

> >

> > Thoughts? Comments?

>

>

>

> Suzi, We test Vit A here in the lab almost daily on flour. I'll

have

> to find a procedure to test chicken livers from our farm. Our

> chickens are consuming lots of fast growing green grass and worms

and

> bugs as well. The liver from my chicken last week " appeared " to

> have " lots and lots " of yellow coloring within it. And the organ

fat

> was very bright yellow. That is not objective evaluation but until

we

> find a procedure and get a test ran that's all I can do. Dennis

> >

> > Suze Fisher

> > Web Design & Development

> > http://members.bellatlantic.net/~vze3shjg/

> > mailto:s.fisher22@v...

>>>>Suze ( I apologize for misspelling your name), In Association of

analytical chemists(AOAC), 15 th edition, volume II pages 1045-1047

there is a procedure for Vit A in margarine, mixed feeds, premixes

and foods. I'd like to get a procedure from ch m Ruessheim. How do

we do that? The procedure in AOAC for foods may be adaptable to

liver. Dennis

[Guest guest]

>>>>>>>Suze ( I apologize for misspelling your name), In Association of

analytical chemists(AOAC), 15 th edition, volume II pages 1045-1047

there is a procedure for Vit A in margarine, mixed feeds, premixes

and foods. I'd like to get a procedure from ch m Ruessheim. How do

we do that? The procedure in AOAC for foods may be adaptable to

liver. Dennis

****Dennis, didn't test the various livers *herself* - rather she

gathered and presented the data from various sources.

If you are going to seriously test your chicken livers for vit A content,

would you consider doing the same for *grass-fed* liver from other species?

If so, I would be happy to send you some of my grass-fed lamb's liver.

Can you test for other things such as other vitamins and minerals as well?

Suze Fisher

Web Design & Development

http://members.bellatlantic.net/~vze3shjg/

mailto:s.fisher22@...

[Guest guest]

> But, not all beta carotene is necessarily

> converted to vitamin A. But I can't think of where grain-fed

> livestock would get much vit A or its precursors...

>

> Thoughts? Comments?

Hi Suze,

Sorry this is sourceless, but I recall having read not too long ago

that one reason corn is the grain of choice for livestock rations is

because it contains minute but essentially sufficient amounts of

vitamin A...at least in combination with the hay and any silage or

other chopped well stored forage.

[Guest guest]

> >>>>>>>Suze ( I apologize for misspelling your name), In

Association of

> analytical chemists(AOAC), 15 th edition, volume II pages 1045-1047

> there is a procedure for Vit A in margarine, mixed feeds, premixes

> and foods. I'd like to get a procedure from ch m Ruessheim. How do

> we do that? The procedure in AOAC for foods may be adaptable to

> liver. Dennis

>

>

> ****Dennis, didn't test the various livers *herself* -

rather she

> gathered and presented the data from various sources.

>

> If you are going to seriously test your chicken livers for vit A

content,

> would you consider doing the same for *grass-fed* liver from other

species?

> If so, I would be happy to send you some of my grass-fed lamb's

liver.

>

> Can you test for other things such as other vitamins and minerals as

well?

>

>

> Suze Fisher

> Web Design & Development

> http://members.bellatlantic.net/~vze3shjg/

> mailto:s.fisher22@v...

Suze:

...........We routinely test for thiamine, ribo, folic, iron, Vit A,

and niacin in flour. I'll have to find some procedures for the meats

so I'm sure it'll be a while before I can test them. No telling what

standards, reagents, etc I'll need. In the meantime I'm going to work

on Vit A in chicken liver. Dennis

[Guest guest]

>

> If you are going to seriously test your chicken livers for vit A

content,

> would you consider doing the same for *grass-fed* liver from other

species?

> If so, I would be happy to send you some of my grass-fed lamb's

liver.

>

> Can you test for other things such as other vitamins and minerals as

well?

>

>

> Suze Fisher

> Web Design & Development

> http://members.bellatlantic.net/~vze3shjg/

> mailto:s.fisher22@v...

>>>>>>>>>>>>>>>>>>>>>I sent a reply earlier that must have gotten

stuck in the loop so here it is again. I'm going to test some chicken

livers from our farm for Vit. A or beta carotene as applicable. I'll

have to find a procedure, standards, reagents, etc so it'll be a

while. Sure send a sample but not 'til we calibrate out here in KS!

We can check iron, B1 and B2. Dennis