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Genetics Account for 55% of Human Lifespan, Study Finds

3/17/2026

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Summary

Story summary

A study led by Prof. Uri Alon of the Weizmann Institute finds genetics contribute about 55% to human lifespan.
Researchers analyzed family records and twin data to separate intrinsic aging from extrinsic mortality.
The analysis indicates shared biology plays a stronger role in longevity than previously thought.
Lifestyle may improve health but is unlikely to drastically extend lifespan beyond genetic potential, according to experts.

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Story summary

A study led by Prof. Uri Alon of the Weizmann Institute finds genetics contribute about 55% to human lifespan.
Researchers analyzed family records and twin data to separate intrinsic aging from extrinsic mortality.
The analysis indicates shared biology plays a stronger role in longevity than previously thought.
Lifestyle may improve health but is unlikely to drastically extend lifespan beyond genetic potential, according to experts.