my mother keeps telling me things like this...that eating more meat, especially red meat causes colon cancer and things along those lines. i don't know whether it's true or not. i'm not sure where she heard it, but i'm sure (like you said) grass fed vs corn fed makes a difference.
i will maintain the truth
i knew naturally as a child
i won't forfeit my creativity
to a world that's all laid out for me
i'll look at everything around me
and i will vow to bear in mind
that all of this was just someone's idea
it could just as well be mine - ani difranco