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Genetics Account for 55% of Longevity Differences, Study Reveals

2/22/2026

Summary

Story summary

A recent analysis finds genetics may account for about 55% of longevity differences, suggesting a larger genetic role than previously thought.
The study reexamined twin records from Denmark and Sweden to isolate genetic influences by separating deaths from external causes such as accidents and infections.
The approach reveals a stronger genetic signal while acknowledging that lifestyle factors remain significant and that lifespan may have a biological ceiling.

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Story summary

A recent analysis finds genetics may account for about 55% of longevity differences, suggesting a larger genetic role than previously thought.
The study reexamined twin records from Denmark and Sweden to isolate genetic influences by separating deaths from external causes such as accidents and infections.
The approach reveals a stronger genetic signal while acknowledging that lifestyle factors remain significant and that lifespan may have a biological ceiling.