Biogerontologists are now in a position to construct general principles of aging, and genuine attempts are being made to test and develop effective means of intervention, prevention and treatment of age-related diseases, and for achieving healthy old age. This book takes status of the molecular, cellular, hormonal, nutritional and lifestyle strategies being tested and applied. It comprises inter-dependent chapters written in the form of critical reviews by the worlds leading researchers and practitioners in their respective fields. The format of the articles is a semi-academic style in which research data from various experimental systems is presented while focusing on their applications in human beings with respect to the prevention and treatment of age-related impairments. This book is recommended by the World Health Organization Eastern Mediterranean Region Office (WHO-EMRO) as a basic resource for medical faculty libraries.