To give a child animal products is a form of child abuse.

Dogs have a sense of smell much greater than ours and they're much faster than we are. We have fairly dull senses, fairly slow locomotion. In our Olympic trials, we celebrate speeds that would be an embarrassment to a bird or a dog or another animal.

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.

The dangers of eating animal products occur after the age of reproduction. If people developed cardiovascular disease that was fatal by the age of twelve or thirteen, eating animals would have died out long ago. You get it after you've already reproduced.

Medicine is often conservative and slow to incorporate something that wasn't there before and that we're afraid people are going to laugh at us for. But, the beauty of music is - well, a couple things. There are no side effects that are harmful. Music doesn't do that. It doesn't have any negative effects whatsoever. So I do think it's going to come, but I think it's a new idea for people.

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

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.