PubMed, then…
A recent study conducted by the Pediatric Research in Office Settings network provided evidence that girls in the United States, especially black girls, are starting puberty at a younger age than earlier studies had found, but the reasons for this are not known
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Factors other than obesity, however, perhaps genetic and/or environmental ones, are needed to explain the higher prevalence of early puberty in black versus white girls.
So, girls are indeed entering puberty earlier, and this early puberty isn’t entirely attributable to weight…
I’m no hippie, but it seems quite reasonable to me that you absorb what you eat… including growth hormones. Yes, it’s cow growth hormones, but as others have pointed out, humans can utilize cow insulin at the very least.
The Frankenfood stuff, however, is total bull as anyone who has watched that Penn and Teller BullShit! episode knows. What difference does the DNA present within food make, if the food is otherwise chemically harmless?
In any case, once you go organic or small farm meat, you’ll have a hard time going back. It’s like going back to McDonald’s after eating a nice restaurant steak burger. I just wish my local grocery store didn’t equivalate organic to vegan–there’s no meat in the hippie section.