最大规模的领先长寿药物随机对照试验正在进行中
一项针对雷帕霉素（rapamycin）的大规模随机对照试验正在开展，这是迄今为止最大规模的长寿药物临床试验，旨在评估该药物对人类衰老和健康寿命的影响。
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The prevalence of dementia at given ages has decreased compared to decades ago. Today's 90-year-olds have less than half the dementia risk compared to those in 1984.
Research indicates that the heritability of human lifespan is approximately 50% when using a redefined concept of heritability. This suggests genetic factors account for about half of lifespan variation, while environmental and other factors contribute the remaining half.
Heritability measures how much of the variation in a trait within a population is due to genetic differences. It does not indicate how much of an individual's trait is determined by genes versus environment. The concept is often misunderstood in discussions about intelligence, personality, and other complex traits.