This is from Question of Nutrition 5:
Sloppy Second Hormones
Q: People always talk about all the hormones in chicken, milk, etc. Is that anything to be concerned with? I mean, after all, hormones are big proteins. Don’t they just get digested and broken up into their constituent amino acids?
A: Dude, where’d you read that propaganda? Carbon monoxide is just a simple blend of carbon and oxygen, yet you don’t go around sucking it off an exhaust pipe, do you?
The hormones in factory-farmed (feedlot) meat can have all sorts of effects on the body, none of them fully understood and almost certainly none of them good.
And it’s not just the hormones. These miserably treated animals are shot full of antibiotics and fed an unnatural diet of grain, which makes them sick and tilts the balance of their fat towards inflammatory omega-6’s. So even if you’re not a granola-ish animal-rights type person, you should still avoid common supermarket meat like the plague for selfish reasons.
Grass-fed (and humanely treated) beef is the way to go: high omega-3’s, high CLA ? which may help with weight loss ? and no extra antibiotics or hormones you don’t need or want.
If you’re going to take hormones, you should at least get them from a doc and know what you’re taking. Do you really want a cow’s sloppy seconds?