Blood Type and Longevity: What Science Actually Says About Reaching 100

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Some studies show slightly higher centenarian rates in type O populations (e.g., Italian & Japanese studies)

Blood Type A: Mixed Signals

Slightly higher risk of gastric cancer (linked to H. pylori susceptibility)

Some studies show higher stress-induced cortisol (theoretical longevity impact)

But also associated with lower risk of malaria in endemic regions

Blood Types B & AB: Less Clear

Type AB linked to higher cognitive decline risk in one large U.S. study (Neurology, 2014)

But findings are inconsistent across populations

⚠️ Crucial context: Any longevity differences tied to blood type are tiny compared to lifestyle factors. Smoking, for example, shortens lifespan by 10+ years—blood type differences amount to months, if anything.

🌍 What Actually Predicts Extreme Longevity? (The Real Data)

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