Why Are More Young People Getting Cancer?
News Desk
Islamabad: A new study has found that younger generations may be aging faster at a biological level than their parents, a trend that could be contributing to rising cancer rates among young adults.
Earlier this year, researchers reported an increase in 11 types of cancer among adults aged 20 to 49, including breast, colorectal, and pancreatic cancers. These diseases have traditionally been associated with older age groups, prompting scientists to investigate why more younger people are being diagnosed.
Several explanations have been proposed, including poor diet, obesity, tobacco and alcohol use, changes in the gut microbiome, and exposure to environmental pollutants such as microplastics.
However, a new study published in the journal ‘Nature Medicine’ suggests that accelerated biological aging may also play a significant role.
Unlike chronological age, which measures the number of years a person has lived, biological age reflects how well the body is functioning and how quickly it is aging. Factors such as diet, sleep, stress levels, physical activity, inflammation, and overall metabolic health all influence biological age.
Researchers analyzed blood samples and health data from nearly 164,000 adults in the United Kingdom and the United States. Their findings revealed evidence of accelerated biological aging among people in their 30s and 40s, a pattern not observed in previous generations.
The study found that individuals born between 1965 and 1974 showed signs of aging more rapidly at a cellular level than those born two decades earlier. In many cases, their biological age appeared older than their actual age.
Scientists examined biological markers associated with aging, including DNA damage and inflammation, which are often linked to unhealthy lifestyles and environmental factors.
The findings also revealed that people currently in their 50s are showing signs of accelerated biological aging earlier in life. According to the study, they aged approximately 23 percent faster than individuals who are now in their 70s.
Funded by Cancer Research UK, the study further found that adults whose biological age exceeded their chronological age faced a greater risk of developing cancer before the age of 55.
Lead author Professor Yin Cao of Washington University School of Medicine said biological aging involves more than simply counting years.
“Biological ageing is not just about how many birthdays you have celebrated, but also reflects the damage and breakdown that occurs within the body at a cellular and molecular level,” Cao said.
She explained that these changes may include chronic inflammation, a weakened immune system, and gradual deterioration in the way cells and tissues function.
“Our research suggests that these biological changes are occurring earlier than expected in some younger adults and may be linked to the increasing rates of cancer in younger generations,” she added.
The researchers cautioned that the study was observational and does not prove that accelerated biological aging directly causes cancer. However, they said the findings provide important clues about why cancer rates may be rising among younger adults and highlight the need for further research.
