I would encourage everyone to read the China study which shows that as you increase dairy and meat in the diet of a population cancer and disease skyrocket.
There is a lot of evidence to support that high protein inhibit cancer growth. While carginogens may be cancer causing factors, it is in the high protein diets that they can grow more rapidly.
READ THIS BOOK... It is nothing but raw DATA to support that humans are meant to eat high carbohydrate low fat diets http://www.amazon.com/The-China-Study-Comprehensive-Implicat...
And I suggest you buy it through the amazon store by using the DailyPaul link