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Could the noticeable increase in life expectancy be slowing down? | Health News


A recent study published in Nature Aging by gerontologist Jay Olshansky and his co-authors suggests that the sharp rise in life expectancy seen over the past century is slowing down and will ultimately stop when the average life expectancy reaches 87. The data examined life expectancy in ten countries with the highest life expectancies, including Australia, France, Japan, and the United States, between 1990 and 2019.

The study focused on the concept of “life table entropy,” which suggests there are limits to how far the longevity revolution can go as we push survival into older ages where biological ageing becomes a limiting factor. The researchers predict that the maximum life expectancy will plateau around 87 years, with some countries already close to achieving this milestone.

Olshansky’s previous research suggested that there is only so far medicine can take us in terms of extending lifespans before we reach the inevitable effects of ageing. The next step in the “longevity revolution” is to slow down the biological ageing process itself, which could lead to a second wave of increased life expectancy in the future.

The study also highlighted the disparities in life expectancy improvement among different countries, with Hong Kong showing a stronger continuation of increased life expectancy compared to others. Factors such as economic prosperity and smoking bans have contributed to the improvements seen in specific regions.

In the United States, the slowest improvement in life expectancy was observed, with disparities in access to high-quality healthcare playing a significant role. The lack of universal healthcare in the US has led to a stark divide between those with access to healthcare and those without, impacting overall life expectancy averages.

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Photo credit www.aljazeera.com

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