In this illuminating volume, Roy L. Walford, a physician and a world renowned research scientist at the UCLA Medical School, explains what these breakthroughs will be and how they will come about. He breaks new ground by showing how an understanding of the fundamental biologic processes of aging will bring us lives of at least 120 years-lives that can be as rich, productive, and vigorous as are the 70 or so years of our present average life span. Groundbreaking too is Dr. Walford's own personal program of controlled dietary restriction for extending life-undernutrition without malnutrition. The program, developed from his own research, includes menu plans, recipes, and an extensive chart on the nutritive values of many foods.