Accelerated Aging Increases Cancer Risk in Younger Adults

Cancer is traditionally viewed as a disease of older age, but recent research reveals a troubling rise in cancers among younger adults1 . This increase is linked to accelerated biological aging, a process where the body's physiological age exceeds its chronological age, raising the risk of early-onset cancers2 . Understanding how biological age is measured and its connection to cancer risk can help improve prevention and screening strategies for younger populations3 .

Measuring Biological Age

Biological age reflects the true physiological condition of an individual, which may differ from their chronological age—the actual time elapsed since birth4 . Researchers assess biological age using clinical biomarkers that indicate the body's functional and inflammatory status. Key biomarkers include albumin, creatinine, C-reactive protein (CRP), and various blood cell counts5 .

A prominent study utilized data from the UK Biobank, a large prospective cohort of over 500,000 participants aged 40 to 69 years at recruitment, to analyze biological aging5 . The researchers focused on nine blood-based markers known to correlate with aging:

• Albumin: A liver-produced protein that declines with age3 .
• Creatinine: A waste product from muscle metabolism; lower levels are linked to better longevity3 .
• Glucose: Blood sugar levels tend to remain elevated longer after meals as people age3 .
• C-reactive protein (CRP): An inflammation marker that increases with faster aging3 .
• Lymphocyte percentage: White blood cells important for immune function, which decrease with age3 .
• Mean cell volume: Average size of red blood cells, which increases with age3 .
• Red cell distribution width: Variation in red blood cell size, increasing with age3 .
• Alkaline phosphatase: An enzyme from liver and bone that rises with age3 .
• White blood cell counts: Higher counts within the normal range may indicate greater aging3 .

These markers were combined using an algorithm called PhenoAge to calculate each individual's biological age. Accelerated aging was defined as having a biological age higher than chronological age3 . This approach allows for a more precise assessment of aging-related health risks beyond simple calendar age4 .

💡 Did You Know?
Each standard deviation increase in accelerated aging was linked to a 42% higher risk of early-onset lung cancer, a 22% higher risk of early-onset gastrointestinal cancer, and a 36% higher risk of early-onset uterine cancer2 .

Accelerated Aging and Cancer Risk Connection

Age is the most significant risk factor for cancer, but the rate at which individuals age biologically varies widely4 . Accelerated biological aging has been associated with increased risk for both early- and late-onset cancers, including lung, gastrointestinal, and uterine cancers6 .

Studies show that younger adults with faster biological aging have substantially higher cancer risks compared to their peers with slower aging7 . For example, individuals with the highest accelerated aging scores had:

• Twice the risk of early-onset lung cancer7 .
• Over 60% increased risk of gastrointestinal tumors7 .
• More than 80% higher risk of uterine cancer7 .

Another study reported that participants in the highest quartile of biological aging had a 334% greater risk of developing lung cancer compared to those with the lowest aging rates8 . These findings highlight the strong link between biological aging and cancer susceptibility in younger populations.

Accelerated aging may contribute to cancer risk through mechanisms such as:

• Reduced tissue regenerative capacity, especially in organs like the lungs3 .
• Increased chronic inflammation, which promotes tumor development, particularly in the gastrointestinal tract3 .
• Cellular senescence, where damaged cells cease to divide but secrete pro-inflammatory factors that can encourage cancer growth6 .

Cancer survivors, especially those treated during adolescence or young adulthood, often exhibit signs of accelerated aging, which may increase their risk of developing second cancers6 . This underscores the importance of monitoring biological age in cancer survivors to guide follow-up care and prevention.

“We’re seeing more and more cancers, especially gastrointestinal cancers and breast cancers, in younger individuals. And if we had a way of identifying who’s at higher risk for those, then really, you can imagine we’d be recommending screening at a different time.”

— Dr. Anne Blaes, University of Minnesota3

Slowing Biological Aging

Understanding and identifying accelerated biological aging opens opportunities to slow the aging process and reduce cancer risk in younger adults. Lifestyle factors such as diet, physical activity, and smoking significantly influence biological age9 . Adhering to a healthy lifestyle can retard aging and lower the risk of age-related diseases, including cancer4 .

Because biological age is influenced by multiple processes, relying on a single biomarker may not capture the full picture. Using multiple biomarkers improves the accuracy and reliability of biological age assessment5 . However, the clinical utility of commercial biological age tests remains under investigation5 .

Potential strategies to slow biological aging include:

• Lifestyle modifications: Improving nutrition, increasing exercise, and quitting smoking9 .
• Targeted medications: Senolytics are drugs that selectively remove damaged and aging cells, potentially reducing accelerated aging effects3 .
• Personalized screening: Identifying individuals with accelerated aging could help tailor cancer screening and prevention efforts more effectively4 .

Cancer therapies such as chemotherapy and radiation can accelerate biological aging by causing DNA damage, telomere shortening, and stem cell exhaustion10 . This accelerated aging may contribute to long-term health complications and increased secondary cancer risk in survivors6 . Research is ongoing to develop interventions that mitigate therapy-induced aging.

💡 Did You Know?
Medications targeting senescent cells are being tested in cancer survivors to slow accelerated aging, but their use is not yet standard practice3 .