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.

Any food products made from flour, especially whole-wheat flour, form gas when broken down in the large intestine. Beware of eating these types of food before bedtime to avoid feeling inflated in the morning.

The more decisions we make in a day, the more likely we are to make bad decisions - because deciding wears us down. You start making decisions in the morning, and by the middle of the afternoon, you're running on fumes.

I saw many people who had advanced heart disease and I was so frustrated because I knew if they just knew how to do the right thing, simple lifestyle and diet steps, that the entire trajectory of their life and health would have been different.

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.

Your waist size should not be more than half your height.

There were certain elements of the healing process I could not capture. And even if I was right in the science, I could be wrong in the spirit.