Is Smoking Really a Cause of Aging?

The Colonel says he uses his body as an experiment and tries to be a royal model. He has been optimizing his life style for 20 years now, laced on this beat. On tobacco smoking, i to sleep very clear. That's a decade off your life. What we're learning about these various things that you can do to hurt yourself or to protect yourself, is that what's happening is that your body is aging at a different rate. So smokers are older biologically than people who've never smoked. And so why they look older too? Well, we can measure that.