A new friend in Lecce recently asked me for advice about longevity. He was surprised by what he perceived as my relative youth. Others who know that I’ve worked in the field of longevity for years sometimes ask for my “secret.”
I usually joke that the secret was choosing the right parents.
That joke is partly true. Genetics matte, but they may account for only about 20–30% of lifespan. However a recent studies indicate it may be more like 50%( https://www.rnz.co.nz/news/world/585445/greater-role-for-genetics-in-driving-human-lifespan-study-finds). The rest is something far more actionable.
Genetics Set the Ceiling but how You Live Determines the Outcome
I believe genetics determines your maximum potential lifespan. In that respect, I did win the lottery.
My father lived to 97 and remained in excellent physical condition, working out six days a week until he was 95. Had he treated his brain like a muscle as well, he might have avoided the dementia that appeared late in life. My mother, sadly, died young at 67 by taking her own life but her mother lived to 94 and her mother’s mother to 98.
So while genetics may define the ceiling, everything you do during your life subtracts from it.
Smoking at 20 may shave a decade off your lifespan. Chronic sleep deprivation quietly steals years. Poor metabolic health doesn’t announce itself early—it slowly gnaws away at your longevity. Longevity is less about adding years than about not losing them unnecessarily.
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