Accelerated Biological Aging Tied to Early-Onset Cancer

A new study suggests that younger generations are aging faster at a biological level than their predecessors, a phenomenon that may be contributing to the rising global incidence of cancers diagnosed before age 55. The research, published in the journal Nature Medicine on June 22, 2026, provides a potential clue to one of modern medicine's most pressing mysteries.

For decades, cancer has been viewed primarily as a disease of older age, but doctors worldwide have documented a concerning increase in diagnoses among younger adults. Cancers such as colorectal, lung, and uterine cancer are becoming more common in people under 55. A team led by researchers at Washington University School of Medicine in St. Louis investigated whether accelerated biological aging could be a factor.

The study analyzed data from over 154,000 participants in the UK Biobank and more than 10,000 individuals from the U.S. All of Us Research Program. Scientists estimated biological age using blood-based markers related to liver function, kidney health, metabolism, and other systems, creating a measure of systemic aging. They also examined proteins linked to specific organs to assess tissue-specific aging.