Now in paperback, UltraLongevity presents a revolutionary idea: that aging and aging-related diseases—-including heart disease, cancer, and diabetes—-are autoimmune problems, and that a well-managed immune system is the key to healthy aging. Starting with a quiz—-“How Fast Are You Aging?”—-Dr. Mark Liponis explains the new science, lays out an accessible and proven 7-step program with an 8-day meal plan, and motivates readers to put the program into practice so that they can keep their minds sharp, become more physically fit, be more resistant to infections and disease, and feel and stay younger than they ever imagined.