Learn the evidence-based science of healthspan — how to live longer AND stay healthier — from what large, long-term studies actually show, not from supplement ads or fad protocols. Understand the behaviors that move the needle most: cardiorespiratory fitness (VO2max) and muscle strength, quality sleep, a plant-forward eating pattern, not smoking, moderating alcohol, and keeping blood pressure, cholesterol, and blood sugar in check — plus the powerful role of social connection and a sense of purpose. Just as important, learn to think critically about longevity claims: correlation vs causation in nutrition epidemiology, why there is no proven anti-aging pill, the real limits of “blue zones” and biological-age tests, and how survivorship bias distorts centenarian stories. Builds on Human Biology and Nutrition. Held to the strictest evidence bar — established consensus only, no hype. Educational only — general healthspan science, not medical, diagnostic, or personalized health advice.