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'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.

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

It's much better to say, "If the herd is running, I'm running with those guys." And humans have herd mentality.

The important thing is that while heroin and cocaine and tobacco and every drug and junk food cause dopamine release, there are healthier ways that you can put this into your life. And the three big ones are intimacy ... physical activity ... and the third thing is music.

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.

Another advantage of avoiding sodas is that you will avoid the caffeine that is in many of them. Caffeine is a weak diuretic that causes calcium loss via the kidneys.