For decades, we were told that genetics explains only ~20% of how long humans live.
A new Science paper shows that estimate was fundamentally flawed.
The key issue: prior studies failed to distinguish extrinsic mortality (accidents, infections, violence) from intrinsic mortality driven by biological aging and age-related disease. When those confounding factors are properly removed, the picture changes dramatically.
Analyzing multiple Scandinavian twin cohorts, twins raised apart, and siblings of U.S. centenarians, the authors show that ~50–55% of intrinsic human lifespan is heritable—roughly double previous estimates and comparable to most complex human traits.
This finding strongly validates a core idea that led to the founding of Human Longevity.
Human Longevity was started by Dr. Craig Venter, one of the first scientists to decode the human genome, with a simple but bold premise: by understanding your genome, we can meaningfully improve your healthspan and lifespan.
Why this matters:
Aging has a strong genetic architecture
Longevity is not mostly random or environmental noise
Biology-driven risk can be measured, modeled, and acted upon
Precision medicine and AI-based early detection are not incremental—they are foundational
In short: when you strip away accidents and infections, biology speaks clearly.
Longevity is not luck.
It is increasingly a data-driven, solvable problem.