Wouldn't you like to know how to prevent your body from aging badly? The original YOU book showed how bodies work in general, and YOU: On a Diet explained how bodies lose weight and stay fit. Now in YOU: Staying Young, Drs. Michael Roizen and Mehmet Oz illuminate the mysterious mechanisms with a lively metaphor -- the modern city. You -- as mayor, resident, and street cleaner -- have the power to balance your biological budget to ensure a life that's both long and strong. YOU: Staying Young is filled with signature YOU Tools, including YOU Tests, YOU Tips, and visual and verbal metaphors to bring the science to life.