Nutrition availability
Safety and infrastructure
Economic stability
Two people with the same blood type can have vastly different life expectancies depending on these external conditions.
This further weakens the idea that blood type is a major determinant of longevity.
Aging is not destiny—it is a process
One of the most important modern understandings in health science is that aging is influenced but not fully predetermined.
While genetics provide a baseline, lifestyle choices can significantly shape how well and how long a person lives.
Many people who reach 100 years old do not do so because of a single biological trait, but because of cumulative healthy habits over decades.
Conclusion: what the science really says
