Accelerated biological aging linked to early-onset colorectal cancer in major study

A large prospective study published in Clinical Gastroenterology and Hepatology examined the relationship between biological aging and early-onset colorectal cancer (diagnosed before age 50) in a cohort of over 200,000 East Asian adults. The researchers found that individuals with accelerated biological aging—measured using established aging clocks—had substantially elevated risk of developing colorectal cancer at younger ages, independent of traditional risk factors. This matters because early-onset colorectal cancer rates have been mysteriously rising in many countries over recent decades, affecting people in their 30s and 40s at increasing frequency. The findings suggest that biological aging acceleration, rather than just chronological age, may be a key driver of this troubling trend. This could reflect the cumulative impact of modern environmental exposures, dietary patterns, sedentary behavior, and metabolic dysfunction that accelerate cellular aging. The study's large size and prospective design strengthen confidence in the findings. Practically, this suggests that biological age measurements might eventually help identify younger adults who would benefit from earlier or more intensive colorectal cancer screening, and that interventions slowing biological aging could potentially reduce early-onset cancer risk.