I don't know how different the number is for the US specifically but around 85% of soy grown is used for animal feed. I don't know what the intersection of GMO and animal feed is, but anecdotally, a lot of the soy I see for human consumption is non-gmo.
But that raises the question of what soy's GMO status has to do with its affect on the endocrine system?
But that raises the question of what soy's GMO status has to do with its affect on the endocrine system?