Researchers Determine Max Human Lifespan
Since the 19th century, the average lifespan has increased almost continuously. Thanks to the advancement in the health care and medical industries - people are surviving various kinds of diseases and are getting more aware of what’s good or bad for their health.
But the maximum human lifespan has already been reached, according to researchers. They say it may not be possible to extend it beyond the ages already attained by the oldest people on record.
For the study, scientists at Albert Einstein College of Medicine analysed data from the Human Mortality Database which compiles mortality and population data from more than 40 countries. The data shows that during 1990s, such countries showed a decline in late-life mortality. But when the research team looked at survival improvements since 1900 for people aged 100 and above, they found that gains in survival peaked at around 100 and then declined rapidly, regardless of the year people were born.
They found that age at death for the supercentenarians increased rapidly between the 1970s and early 1990s but reached a plateau around 1995.
Based on the data, the researchers computed the average life span of human is 115 years, and that the absolute limit is 125 years. Expressed another way, this means that the probability in a given year of seeing one person live to 125 anywhere in the world is less than 1 in 10,000.
"Further progress against infectious and chronic diseases may continue boosting average life expectancy, but not maximum lifespan," said lead author Jan Vijg, Ph.D. She is a professor and chair of genetics, the Lola and Saul Kramer Chair in Molecular Genetics, and professor of ophthalmology & visual sciences at Einstein.
"While it’s conceivable that therapeutic breakthroughs might extend human longevity beyond the limits we’ve calculated, such advances would need to overwhelm the many genetic variants that appear to collectively determine the human lifespan. Perhaps resources now being spent to increase lifespan should instead go to lengthening health span—the duration of old age spent in good health."
Source of this article:
Evidence for a limit to human lifespan
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