If in the past, life expectancy was 50ish, and is now expected to rise to 100, would this mean that signs of aging (grey hair, wrinkles, bones and muscles becoming weaker) would happen later in life at around 70-80?
In: Biology
It depends on how the change in life expectancy is achieved. If it’s done via a change in daily behaviors and habits, then you may see people who are still fit and healthy at older ages than typical. If it’s done via medical intervention for conditions associated with aging, then there won’t be a change in when signs of aging show up, and just a delay in death; more elderly people who are still infirm, but aren’t getting sick or as sick.
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