Do hormones in chickens affect their eggs?

Answered on August 19, 2014
Created October 18, 2010 at 10:53 PM

I live in Argentina. Here, chickens are given tons of hormones (so I don't eat them); however, cattle are (by law) never given any hormones, so they're fully natural (and mostly grass fed!), so I eat lots of beef.

However: I love eggs, and eggs are very paleo, of course. But, I'm wondering: eggs come from chickens; so do the hormones given to the chickens affect the eggs?

(There is little/no organic industry in Arg, so that isn't an option here.)

Thank you!


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5 Answers


on October 19, 2010
at 05:32 AM

Think of a similar question: Are hormones given to cows affect their milk? Are the pesticides and antibiotics given to cows affect their milk? Of course they are also found in milk. Milk is produced from nutrients from their blood. And in fact, the pesticides in butter is greater than the pesticides found in beef fat.

Another thing is that chickens are sometimes given arsenic, a toxin, to help them grow big. Arsenic is also found in their eggs, according to this source and this.

So basically, we should assume that anything you feed the chicken with will go straight to the eggs!

But what's the deal with hormones, anyway? Hormones are neutralized by heat. So hormones are not a problem to worry with.

The only things to worry about aren't hormones, but the pesticides and the feed consumed by them.


on October 19, 2010
at 01:53 PM

The health of the chicken 100% affects the health of the egg. I wouldn't dare risk eating hormone, antibiotic, grainfed eggs. Enjoy a steak, and keep your eyes peeled for healthy eggs in the future



on October 19, 2010
at 01:50 PM


Ask yourself this - do hormones in humans affect their babies?


on December 27, 2010
at 04:49 PM

The sad news is that most beef currently sold in Argentina (at least in Buenos Aires and surroundings) is no more grass-fed. It used to be that way but about ten years ago the feed-lot products took over, so that grass fed is only for exports, or cattle raised and consumed in some provinces (like Chaco, San Luis, etc). Feed lot products are currently strongly subsidized by Argentine Governement, too, unlike grass fed meat!


on October 19, 2010
at 12:36 PM

I don't know whether it's the hormones or not, but I can certainly tell the difference from the organic free-range eggs (and these are the real thing, not the industrially certified shams you get in supermarkets) versus supermarket eggs. The real eggs are darker-yolked, larger, vary in shell colour, and thinner-shelled, whereas their supermarket counterparts are smaller and almost perfectly uniform in size, and have pale yellow yolks.

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