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What does research on twins suggest about the inheritance of human longevity?

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What causes our skin to wrinkle as we age? — human aging Overview of why skin ages.

Research on twins provides significant evidence for the genetic influence on human longevity. Studies indicate that monozygotic (genetically identical) twins tend to exhibit more similar life spans than do like-sex dizygotic (fraternal) twins, who share only a portion of their genetic material.1

While investigating the inheritance of longevity in humans is complex due to the influence of socioeconomic and environmental factors, this observation in twins supports the broader conclusion that longevity is determined in part by heredity. This genetic component is further supported by observations that individuals with long-lived parents often live longer themselves, suggesting that genes play a role in determining an individual's potential life span.123

It is important to note that human aging is a multifaceted process influenced by a combination of genetics, lifestyle choices, and environmental factors. While heredity contributes to the susceptibility to major age-related conditions—such as coronary heart disease—the overall expression of longevity remains a complex interplay between inherited traits and external circumstances.31