While I was gone, apparently The China Study received some belated smackdown. I've personally never paid much attention to that book. I took several advanced statistics classes for my degree and an epidemiology class. If I wanted to base my diet on that flawed methodology, I might be more interested. But you can hash and rehash data and it won't change the fact that epidemiology (like my own science, economics) has been responsible for crap conclusions that have not bared out in the real world.