Most people think their age is simply the number of years they have lived. However, scientists now know that the body can age at a different speed. This is known as biological age, which may be younger or older than your actual age.
A new study published in Nature Aging shows that how fast your body ages over time may be strongly linked to your risk of death.
Researchers studied a group of people living in the Chianti region of Italy as part of a long-term project called the InCHIANTI study. This study followed 699 adults for about 24 years, starting in the late 1990s and continuing until 2024. The average age of participants at the beginning was around 63 years old.
To measure biological aging, scientists used a method called an epigenetic clock. This tool looks at small chemical changes in DNA known as DNA methylation. These changes do not alter the DNA itself but can affect how genes are turned on or off. Over time, these patterns change in ways that are linked to aging.
DNA methylation is influenced by many factors, including environment, lifestyle, and natural aging. Because of this, it can provide a useful way to estimate how fast a person’s body is aging. Scientists have developed several types of epigenetic clocks.
Some are designed to match a person’s actual age, while others are better at predicting health risks or the speed of aging.
In this study, researchers used seven different epigenetic clock models. These included early versions that estimate age, newer ones that predict disease and death risk, and more advanced tools that measure how quickly aging is happening over time.
Unlike earlier studies, which often looked at biological age at a single point in time, this research followed changes over many years. DNA samples were collected from participants at two or three time points, including 1998, 2007, and 2013. By comparing these samples, the researchers could calculate how each person’s biological age changed over time.
They focused on the rate of change, which can be thought of as the speed of aging. Some people’s biological age increased slowly, while others showed a faster rise. The researchers then compared these rates with official records of death to see if there was a connection.
The results were clear. People whose biological age increased more quickly over time had a higher risk of death, regardless of how old they were at the start of the study. In other words, the speed of aging mattered more than the starting point.
The study also found that aging does not always happen at a steady pace. In some individuals, biological aging seemed to speed up as they got older. This suggests that the aging process may become more rapid later in life, which could increase the risk of disease.
These findings support an important idea in a field called geroscience. This area of research suggests that aging itself is a major cause of many long-term diseases, such as heart disease, diabetes, and dementia. If scientists can find ways to slow down aging, it may be possible to delay or prevent these conditions.
Tracking changes in biological age over time could become a useful tool in healthcare. Instead of only looking at a person’s age or current health, doctors might one day monitor how fast their body is aging. This could help identify people at higher risk and guide treatments to improve long-term health.
However, there are still questions to answer. This study mainly included older adults from one region, so more research is needed in different populations. It is also not yet clear how lifestyle changes or treatments might affect the speed of biological aging.
Overall, the study shows that aging is not just about how many years you have lived. It is also about how your body changes over time. By understanding and measuring this process, scientists hope to find new ways to help people live longer and healthier lives.
When we look closely at these findings, they suggest that biological aging is dynamic and can change throughout life. This means there may be opportunities to slow it down.
At the same time, the study highlights the importance of long-term monitoring rather than relying on a single measurement. While promising, these tools are still mainly used in research and are not yet part of routine medical care.
The study provides strong evidence that the pace of aging is an important indicator of health and survival. With further research, it may become possible to use this information to improve prevention and treatment strategies for age-related diseases.
If you care about wellness, please read studies about nutrients that could combat inflammation in older people, and essential foods for healthy aging.
For more health information, please see recent studies about the link between processed foods and chronic diseases, and a simple diet change for a healthier life after 65.
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