That headline takes a small piece of research and turns it into a much bigger claim than the evidence supports.
What the research found
One often-cited study of Japanese centenarians (people aged 100+) found that blood type B was more common among centenarians than in the comparison group, suggesting a possible association with exceptional longevity. However, the study was relatively small and did not prove that blood type B causes people to live longer.
What scientists actually think
Longevity is influenced by many factors, including:
- Genetics
- Blood pressure
- Blood sugar control
- Kidney and liver health
- Smoking status
- Physical activity
- Diet
- Socioeconomic and environmental factors
Recent research on people who reach 100 has focused much more on health markers and lifestyle factors than on blood type alone. Studies have found that centenarians tend to have more favorable metabolic and organ-function biomarkers years before reaching 100.
Why the headline is misleading
Even if blood type B is associated with a slightly higher likelihood of reaching 100 in some populations, that does not mean:
- People with other blood types can’t live to 100.
- Blood type determines lifespan.
- Knowing your blood type predicts your future longevity.
The effect of lifestyle and overall health is likely much larger than any effect of blood type. Research consistently links factors such as not smoking, staying physically active, maintaining a healthy weight, and eating a balanced diet with a greater chance of exceptional longevity.
