We know what we should and shouldn't put in our mouths, but in those times that pull on our souls, we revert to what's emotionally comfortable.

Here's the number one reason Americans are heavy: The brain, very smartly, wants nutrition. But the average American is not eating nutrients; he or she is eating empty calories. So you finish that 2,000 calories and your brain says, Keep going until you get nutrients.

People change based on what they feel, not what they know. Which means that understanding all that advice doesn't matter if there's no deep, profound, visceral awareness of why it's important.

Medicine has always been my calling.

Make the driving force in your life love.

Our ancestors had to eat whenever food was around. And we're actually still hardwired the same way. The big difference is we don't have to hunt for our food. For us, "hunting" comes down to sliding the milk carton out of the way.

There are a lot of food Nazis in the U.S., but I believe if you can show people what's really important, they'll judge the rest for themselves.