The text is an excerpt from Mark Hyman's book, Young Forever, which explores the science of aging and proposes a lifestyle plan to extend health span and life span. Hyman argues that aging is a treatable disease, outlining the ten hallmarks of aging and their root causes, such as inflammation, insulin resistance, and a dysfunctional microbiome. He then presents a comprehensive program encompassing diet, exercise, stress management, sleep optimization, and supplement recommendations, emphasizing the importance of addressing imbalances in seven core biological systems. The book concludes with a discussion of cutting-edge technologies like stem cell therapy and peptide therapy, and their potential to revolutionize aging.