Longevity is not controlled by one factor. It is shaped by a combination of genetics, lifestyle, environment, healthcare access, and even luck. Blood type may play a very small role in certain health risks, but it is far from a reliable predictor of how long a person will live.
To understand this properly, we need to break down what blood types are, what research actually shows, and how aging is influenced by multiple overlapping systems in the body.
What blood type actually means
Blood type refers to specific proteins and sugars—called antigens—found on the surface of red blood cells. The most well-known system is the ABO blood group system, which classifies blood into four main types:.@@@
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A
B
AB
O
There is also the Rh factor, which determines whether a blood type is positive or negative.
