According to Dr. Kaayla Daniel in her article Second-hand Soy from Animal Feeds, four studies to date indicate soy phytoestrogens, known as isoflavones, end up in the egg yolks of chickens fed soy based feed with one study showing that they end up in the chicken liver, heart, kidney and muscle meat too. In the first study, researchers from the Food Research and Development Laboratories in Shizuoka, Japan fed laying hens a diet with a high concentration of soy phytoestrogens (isoflavones) and followed up by measuring isoflavone levels in their blood and egg yolks. Over a span of 18 days, the isoflavones peaked at 65.29 mcg/100 grams on day 12 and remained at this level for the remainder of the experiment. A few years later, scientists published follow-up research to the study above, reporting that they had found the most active form of soy isoflavones known as equol in the egg yolk of soy feed eating chickens. Research out of the University of Maryland and reported in the Journal of Agriculture and Food Chemistry found that quail feed supplemented with the soy isoflavone genistein ended up in the egg yolk but not the egg white. Finally, in 2009, an Ohio State University grad student completed his master’s thesis on the Quantification of Soy Isoflavones in Commercial Eggs and their Transfer from Poultry Feed into Eggs and Tissue. His experiments involved 48 laying hens that were divided into groups and fed either soy-free feed, a regular feed containing 25 percent soybean meal or a special, high soy feed with 500 extra isoflavones per 100 grams. The experiments proved the rapid accumulation of soy isoflavones from chicken feed into eggs and tissues, with the chickens fed the high soy diet laying eggs that contained yolks with a whopping 1000 mcg of isoflavones per 100 grams! - See more at: http://www.thehealthyhomeeconomist.com/ ... unMdD.dpuf
An egg/chicken issue might be a soy issue
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An egg/chicken issue might be a soy issue
http://www.thehealthyhomeeconomist.com/ ... y-allergy/
Hi Deb,
That's an interesting issue. I sort of informally scanned the test results for many of our members, expecting to find a high correlation between sensitivity to soy and sensitivity to eggs/chicken. But the distribution seems to be random. Some correlate, but many do not. IOW, many are sensitive to soy, but not to eggs or chicken, and vice versa, with all sorts of combinations in between.
Soy isoflavones are not proteins — they're a weak hormone, resembling estrogen. That probably explains the lack of an obvious correlation with food sensitivities. Those with a need to avoid soy because of the estrogen issue though, might need to avoid eggs and/or chicken (and possibly any other conventionally-fed livestock or poultry).
Tex
That's an interesting issue. I sort of informally scanned the test results for many of our members, expecting to find a high correlation between sensitivity to soy and sensitivity to eggs/chicken. But the distribution seems to be random. Some correlate, but many do not. IOW, many are sensitive to soy, but not to eggs or chicken, and vice versa, with all sorts of combinations in between.
Soy isoflavones are not proteins — they're a weak hormone, resembling estrogen. That probably explains the lack of an obvious correlation with food sensitivities. Those with a need to avoid soy because of the estrogen issue though, might need to avoid eggs and/or chicken (and possibly any other conventionally-fed livestock or poultry).
Tex
It is suspected that some of the hardest material known to science can be found in the skulls of GI specialists who insist that diet has nothing to do with the treatment of microscopic colitis.
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Gabes-Apg
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Interestingly - with demand for Gluten Free products (and the chance to charge more for your produce if it is gluten free), the farming wholesalers that sell feeds/grain now have a range of 'gluten free' mixes for your chooks. Guess what the main ingredient is.... soy
In chatting with my local farmer at the harvest markets, he didnt like the gluten free grains that were high levels of soy, his chooks didnt do so well, even though 80% of the food the chooks get are scraps and leaf etc from his market garden so their grain intake was only about 20%, the high level of soy did affect them!
He gets soy free grains, and he cracks the wheat before he gives it to the chooks.
As the eggs are produced from chooks that do not eat very much grain, they are not washed, not sprayed with vegetable oil, they settle very well for me!
(and he only charges me $3.70 a dozen, compared to the organic shop that charges $11 for organic free range)
In chatting with my local farmer at the harvest markets, he didnt like the gluten free grains that were high levels of soy, his chooks didnt do so well, even though 80% of the food the chooks get are scraps and leaf etc from his market garden so their grain intake was only about 20%, the high level of soy did affect them!
He gets soy free grains, and he cracks the wheat before he gives it to the chooks.
As the eggs are produced from chooks that do not eat very much grain, they are not washed, not sprayed with vegetable oil, they settle very well for me!
(and he only charges me $3.70 a dozen, compared to the organic shop that charges $11 for organic free range)
Gabes Ryan
"Anything that contradicts experience and logic should be abandoned"
Dalai Lama
"Anything that contradicts experience and logic should be abandoned"
Dalai Lama
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Lesley,Lesley wrote:I wonder if I could eat soy free chicken? And eggs. I will have to do a search.
I tried soy free eggs a number of years back. At first they seemed to be ok but then I started having problems with them too. I never tried soy free chicken. For me I am sure the problem is with the chicken and eggs and not just with the soy they are fed.
Jean
I raised chickens and chicks for 5 years. Just gave them away this spring because my health problems were making it difficult to take care of the pigs, ducks and chicks.
My chickens and pigs adored sprouted grains and beans. I soaked barley, oats, legumes (not soy), sunflower seeds and buckwheat and flax and sprouted them for 5 days. On the 5th to 7th day the beautiful grass was about 6 inches tall and succulent. Sprouting increases the bio-availability of nutrients and makes them more digestible. They ate 'em up!
A lot of work, though. It would probably be hard to find a local farmer who goes through this trouble.
My chickens and pigs adored sprouted grains and beans. I soaked barley, oats, legumes (not soy), sunflower seeds and buckwheat and flax and sprouted them for 5 days. On the 5th to 7th day the beautiful grass was about 6 inches tall and succulent. Sprouting increases the bio-availability of nutrients and makes them more digestible. They ate 'em up!
A lot of work, though. It would probably be hard to find a local farmer who goes through this trouble.