What Studies Have Founded
Some research on centenarians has shown that certain bl00d types appear more frequently among those who live past 100. Other large-scale studies, however, have founded that individuals with non-O blood types (A, B, or AB) may have a slightly higher risk of cardiovascular disease compared with those who have type O.
At the same time, many investigations find no significant differences in bl00d-type distribution between very elderly populations and younger adults. These blended results recommend that if blood type plays a vital role in lifespan, its effect is subtle and may vary across populations.
Possible Biological Explanations

a. Vascular and clotting factors
Bl00d type influences levels of certain clotting and inflammatory proteins. These differences might slightly affect the risk of heart atta.ck, stroke, or bl00d-vessel damage over time.
b. Lipid metabolism
Some genetic variants linked to the ABO system appear related to cholesterol and other blood lipids – key factors in heart health and overall aging.
c. Immune response and disease resistance
