Good health apparently keys off at least these different developments: Genetic programming; Environmental factors; Lifestyle. This book is devoted to the effects of lifestyle on health. Lifestyle includes a wide range of activities that can be detrimental to a normal life-span or health status of the organism. These include smoking, diet, addictions, exercise or the lack thereof, stress, socio-economic status, and personal hygiene. This book presents the latest research in this vital field.