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.

The answer to the American health crisis is the food that each of us chooses to put in our mouths each day. It's as simple as that.

I know of nothing else in medicine that can come close to what a plant-based diet can do. In theory, if everyone were to adopt this, I really believe we can cut health care costs by seventy to eighty percent. That's amazing. And it all comes from understanding nutrition, applying nutrition, and just watching the results.

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

Quite simply, the more you substitute plant foods for animal foods, the healthier you are likely to be.

A good diet is the most powerful weapon we have against disease and sickness.

I was raised on a dairy farm and ate plenty of meat and eggs until about twenty years ago. I started doing nutritional research, and a decade pr so after that my family made some major dietary changes. I'm just paying attention to what the data are telling me: The scientific evidence came first.