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At what height does lifespan decrease? The complex relationship between altitude and longevity

Epidemiological studies have hinted that populations living at moderate altitudes, such as those above 1,500 meters, tend to live longer and experience lower rates of cardiovascular disease, challenging the assumption that at some universal height does lifespan decrease. The relationship, however, is far more complex, with different elevations presenting both unique health advantages and profound risks for longevity.