Blood Type and Longevity: What Science Actually Says About Reaching 100
Nora PatelYou've probably seen headlines like:
"People with blood type O live longer!"
"Blood type A linked to shorter lifespan!"
It sounds intriguing—but here's the truth most articles won't tell you:
The famous Swedish centenarian study you referenced didn't study blood types at all. It examined blood markers (glucose, cholesterol, kidney function)—completely different from your ABO blood type (A, B, AB, O).
Let's untangle the science—without the hype.
🔬 First: Blood Type ≠ Blood Markers (A Critical Distinction)
Term | What It Means | Example |
|---|---|---|
Blood Type | Your inherited ABO/Rh classification (genetic) | Type O+, Type A- |
Blood Markers | Measurable substances in blood (influenced by health/lifestyle) | Glucose, cholesterol, creatinine |
The Swedish study tracked 12 blood markers in 44,637 people over 35 years—and found centenarians typically had:
✅ Lower glucose (<6.5 mmol/L)
✅ Lower creatinine (healthier kidneys)
✅ Lower uric acid (less inflammation)
✅ Moderate cholesterol (not too low, not too high)
💡 Key insight: It wasn't one magic number—it was consistently healthy ranges across multiple systems that predicted longevity.
🩸 So What Does Blood Type Have to Do With Longevity?