There is a detail that immediately strikes you when you listen to the stories of people who pass the age of 110: it is not just the number of candles, but the quality of life with which they get there. Clear mind, autonomy, few ailments.
Not a dragged survival, but a lived old age. This is where a scientific discovery comes from Brazil and changes the way we look at aging. At the center of everything is the immune system of over-centenarians, a much more powerful ally than previously thought.
Why are so many people over 110 in Brazil?
Brazil is one of the countries with the highest number of supercentenarians in the world and, for this reason, it has become a privileged observatory for those who study longevity. Scientists at the University of São Paulo have followed for years over 140 centenarians and around twenty people over the age of 110, coming from very different areas and social contexts. Some of them have lived much of their lives without regular access to modern medical care, yet they have reached extreme ages with astonishing physical and mental resilience.
What the researchers discovered concerns the profound functioning of their organism. The immune system of supercentenarians appears not simply to resist time, but to adapt. The defense cells continue to renew themselves and “clean up” the body efficiently, almost as happens in much younger people.
This means less accumulation of damaged proteins, fewer cellular errors and, consequently, a lower chance of developing age-related diseases such as tumors, cardiovascular problems or dementia.
What makes the supercentenarians immune system special
Looking more closely at the behavior of immune cells, the researchers noticed something unexpected. Some cells that normally have a coordinating role behave like real “special forces”, capable of intervening directly against abnormal or infected cells. It is a more flexible and rapid immune response, rare even in young people.
During the Covid pandemic, this mechanism showed all its effectiveness. Some supercentenarians included in the study contracted the virus in 2020, before vaccines arrived, and managed to overcome the infection. Their immune systems reacted quickly, producing neutralizing antibodies and immediately activating the most effective defenses. A detail that reinforces the idea that the aging of the immune system is not necessarily a slow descent, but can become a form of intelligent adaptation.
Not only live longer, but get sick less
This discovery also helps to reread data already known from other countries. Studies conducted in Sweden show that those who reach 100 years of age tend to get sick less throughout their lives. It’s not just a matter of living longer, but of staying healthy for longer, accumulating health problems much more slowly than average. In some cases, protection appears to be active already around age 80, well before the threshold of extreme longevity.
One aspect that is particularly intriguing is that Brazilian supercentenarians do not follow “model” diets or codified dietary regimes, such as the Mediterranean diet often cited when talking about longevity. This shifts attention even more to the biology and role of the immune system of supercentenarians, probably also influenced by the great genetic variety of the Brazilian population, the result of centuries of mixing.
Researchers are now trying to understand whether these protection mechanisms can be studied, replicated or at least partially stimulated in the rest of the population. The goal is not to pursue the idea of everyone living up to 110 years of age, but something much more concrete and current: to age better, remaining active, autonomous and present in one’s life for as long as possible.
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