At the moment we know that Spaniards will have a life expectancy of 85.8 years in 2040, which will make Spain the country with the highest life expectancy in the world, according to a study by the University of Washington (Seattle, USA). We dream of a time when modern medicine will allow humans to live much longer, but, Is there an upper limit to what is biologically possible?
Well, there is an answer: yes. A new study suggests that human life expectancy maximum probably reaches 150 years, collect ‘Science Alert’.
The research takes advantage of the idea of biological aging or senescence: how quickly our bodies deteriorate, which may or may not coincide with our chronological age (how many birthdays we have celebrated).
In this case, the scientists developed a new way of interpreting fluctuations in the amount of different types of cells blood tests, which resulted in a measure they called a dynamic body state indicator (DOSI).
Over time, it shows that recovery capacity of our bodies slowly decreases, which is one of the reasons it takes longer to recover from illness and injury when we are older.
Assuming we can avoid diseases, disasters and ninja assassins over the course of our lives, DOSI is a reliable method of showing when that resilience would completely disappear, the researchers say.
“Extrapolation of this trend suggested that the recovery time of DOSI and the variance would diverge simultaneously at a critical point of 120-150 years of age, which corresponds to a complete loss of resilience, “the researchers explain in their article.
Data from 4,532 people
Blood cell count information from more than half a million people from research databases in the UK, US and Russia was analyzed, along with step count data from 4,532 people to measure the rate of decline in physical fitness in people’s bodies.
The blood cell counts they could indicate a variety of problems in the body. To make sure it was a good overall indicator of overall health and recovery, the team used the step count data to verify their thinking.
Another discovery made from the data was a change in aging trajectories from 35 years on, and then again from age 65 onwards. That coincides with some of the limits that exist in society, such as the age at which people tend to retire from elite sport and the age at which people tend to withdraw from full-time work.
Later, the researchers note that the study could be used to inform treatments that can attack diseases and ailments without affecting biological resistance, and perhaps one day even extend the maximum possible life beyond what it already is. However, we will need a lot more research and a lot more data first.
The new analysis is generally in line with previous studies that have mentioned a maximum lifespan of around 120-140 yearsAlthough, in any kind of numerical processing like this, there is a degree of educated guesswork and estimates.
At the time of writing this article, the older age that someone has ever reached recorded is from 122 years, 164 days, according to French Jeanne Calment. What this study posits is that without some pretty radical changes in our bodies on a fundamental level, it would be difficult to squeeze too many more years out of our fragile ways.
“We conclude that criticality that results in the end of life is an intrinsic biological property of an organism that is independent of stress factors and it signifies a fundamental or absolute limit of human life expectancy, “the researchers write.