Chimpanzees will eat a little bit of meat. But, they never eat dairy products, and no other animal would do that.

I was aware of what animals go through because I had driven animals to slaughter and I'd killed animals. And I was aware that there were certain ethical issues, but they weren't preying on my mind very heavily.

I don't approve of the use of animals for any purpose that involves touching them - caging them.

I'm thinking of people in rural Japan and China, where McDonald's hasn't yet arrived. These are the thinnest, healthiest, longest-lived people with the least risk of cardiovascular disease and diabetes.

In my own life, I decided to leave meat off my plate in medical school, but was a bit slow to realise that dairy products and eggs are not health foods either.

Chicken fat, beef fat, fish fat, fried foods - these are the foods that fuel our fat genes by giving them raw materials for building body fat.

People do lose weight on an Atkins diet. The reason they lose weight is because of calorie reduction. If a person's caloric intake has not fallen, if they are really shoveling in the steak, they don't lose weight.