Scientists have long debated whether we #humanshaveanupperagelimit. The general consensus is that the #riskofdeath increases steadily with age. At the age of 50, for example, our risk of dying within the next year is three times more than when we were 30. And at the age of 100, our odds of making it to our next birthday, is a measly 60%.
However, animal models such as #yeast, #fruitflies and #nematodes exhibit something called a #mortalityplateau, wherein the chances of death do not increase past a certain age. A similar phenomenon has been difficult to demonstrate in humans, partly because of the difficulty in obtaining correct data on the oldest people.
An Italian study has found that we humans can stall aging without expensive #drugs or punishing #diets; we just have to wait until we are 105. According to this study, the odds of dying reach a level-off in individuals aged 105 or older; meaning a 106-year-old has the same probability of reaching the age of 107 as a 111-year-old has of reaching the age of 112 years. The researchers also found that over time, more and more people are reaching the age of 105.
This plateau phase might occur because frailer individuals die-off early-on, leaving alive only the toughest. Many factors, including #genes, might account for this #hardiness; identification of these factors can help boost the survival in younger individuals. This study suggests we haven’t yet reached the #limitofhumanlongevity.Tags: Aging, elderly humans, genetics, human longevity, mortality-plateaus