Peter Attia first considered longevity during his training to become a cancer surgeon. Years later, he realized a critical insight: to save eggs, you must stop the person throwing them rather than just attempting to catch them.

Most people desire a long life, but it requires a clear definition. Longevity consists of two parts: your total lifespan and your quality of life during those years. The goal is not just to live longer but to be healthy enough to enjoy the extra time. Achieving this is difficult because contemporary medicine primarily concentrates on preventing immediate death, while managing long term chronic conditions is far more complex.