Wouldn't you like to know how to prevent your body from aging badly? Most of us believe that at age 40 or so, we begin the slow and steady decline of our minds and bodies. According to Dr. Roizen and Dr. Oz, that's a mistake. Aging isn't a decline in our systems. It's actually very purposeful. The very systems and biological processes that age us are designed to help us when we're a little bit younger. Our role is to learn how those systems function so we can reprogram them to work the way they did when we were younger. Your goal should be: die young at any age. That means you live a high quality of life (with everything from working joints to working genitals) until the day you die.