All guides
Learn — Longevity & Healthspan
Evidence-based guides on how the body ages and what actually moves healthspan.
6 min read
Biological Age: What It Is and How It's Measured
Two people born on the same day can be biologically years apart. Here is what biological age means, how researchers estimate it, and why it responds to how you live.
Read →6 min read
VO2max: Why Cardiorespiratory Fitness Predicts Longevity
Of all the numbers you can track, few predict long-term health as strongly as VO2max. Here is what it measures, why fitness maps so tightly to lifespan, and how the number moves.
Read →5 min read
Grip Strength: A Simple Biomarker of Healthy Aging
One of the cheapest measurements in medicine — how hard you can squeeze — turns out to be a strikingly good predictor of long-term health. Here is why, and what moves it.
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This guide is educational and is not medical advice, diagnosis, or treatment. Longevity science evolves; individual results vary. Consult a qualified healthcare professional before acting on anything here.