Nutrition is not a mathematical equation in which two plus two is four. The food we put in our mouths doesn't control our nutrition-not entirely. What our bodies do with that food does.

No chemical carcinogen is nearly so important in causing human cancer as animal protein.

Furthermore, a pattern was beginning to emerge: nutrients from animal-based foods increased tumor development while nutrients from plant-based foods decreased tumor development.

Usually, the first thing a country does in the course of economic development is to introduce a lot of livestock. Our data are showing that this is not a very smart move and the Chinese are listening. They are realizing that animal-based agriculture is not the way to go.... We are basically a vegetarian species and should be eating a wide variety of plant food and minimizing our intake of animal foods.

Cows' milk protein may be the single most significant chemical carcinogen to which humans are exposed.

Everything in food works together to create health or disease. The more we think that a single chemical characterizes a whole food, the more we stray into idiocy.

One way to identify the optimal human diet, pretty obvious to all but fundamentalist reductionists, is to survey and compare populations as they already exist, and see what they eat and how healthy they are.