Your body age isn't your birthday age. Take the 3-minute test based on Blue Zones and PhenoAge research. See your organ ages, life expectancy, and top 3 fixes.
The most comprehensive free biological age calculator online. A 4-step wizard (~3 minutes, 20 questions) assesses your lifestyle, mental state, social connections, and health markers to calculate your biological age vs chronological age. Based on peer-reviewed research: Horvath and PhenoAge epigenetic clocks, Holt-Lunstad loneliness meta-analysis, Blue Zones by Dan Buettner, Harvard 80-year study, and PREDIMED Mediterranean diet trial. See your aging pace (0.5-1.5x), country-adjusted life expectancy, 5 organ-specific ages (heart, lungs, brain, skin, fitness), top 3 things aging you, top 3 wins keeping you young, Blue Zone comparison, and personalized reversal potential.
Rules-based calculators like this give a useful estimate based on well-researched lifestyle factors. For lab-grade accuracy, epigenetic tests (Horvath clock, GrimAge) via blood/saliva samples are the gold standard — but they typically cost $300-500.
Chronological age is years since birth. Biological age estimates how "old" your body actually is based on cellular, organ, and health markers. Two people the same chronological age can have biological ages 10+ years apart.
Exercise is the single largest modifiable factor — 150+ min/week of activity can add 3-7 years of life. Quitting smoking adds up to 10 years. Strong relationships add 4-5 years (Harvard 80-year study).
Five regions with the highest concentration of centenarians: Okinawa (Japan), Sardinia (Italy), Nicoya (Costa Rica), Ikaria (Greece), and Loma Linda (California, Seventh-day Adventists). Dan Buettner documented their shared lifestyle patterns.
Yes. A meta-analysis of 148 studies by Holt-Lunstad (2010) found chronic loneliness increases mortality risk equivalent to smoking 15 cigarettes per day. Social connection is the most underrated longevity factor.
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