International bestselling authors of YOU: The Owner's Manual and YOU: On a Diet give you all the tools and know-how to stay young and defy the ageing process. Drawing lively parallels between your body and aspects of city life, Drs Roizen and Oz show you how to balance your ‘biological budget’ to ensure your life is long and strong. If your body is a city, the authors explain, it is up to you as mayor, resident and street cleaner to ensure it remains a vibrant city – after all, who wants to live in a run-down, one-horse town?