Summary: New research links accelerated biological aging with the rising incidence of early-onset cancers—those diagnosed at age 55 or younger—across recent generations. By analyzing biomedical and molecular data from more than 154,000 UK Biobank participants and over 10,000 people in the U.S. All of Us Research Program, investigators measured the gap between chronological age and biological age using blood biochemistry, metabolomics and proteomic-based algorithms such as PhenoAge. They found that younger birth cohorts show faster biological aging than earlier cohorts at the same chronological age, and that this accelerated aging associates with higher risk of early-onset solid tumors.
Measuring the difference between how many years someone has lived and how old their body appears to be, the researchers observed that systemic (whole-body) aging and organ-specific aging patterns both matter. Advanced systemic biological age corresponded to an 8% to 15% higher risk of early-onset solid cancers overall, while aging signatures localized to particular organ systems predicted specific cancers—for example, accelerated immune-system aging correlated with higher early-onset lung cancer risk, and older-appearing adipose tissue correlated with early-onset colorectal cancer risk.
Key Facts
- Generational rise in biological aging: In the UK sample, people born 1965–1974 showed systemic aging about 23% of one standard deviation higher than those born 1950–1954. In the U.S. sample, participants born 1990–1999 showed systemic aging about 92% of one standard deviation higher than those born 1965–1969.
- Higher cancer risk with faster aging: Advanced systemic aging was associated with an 8% increased risk of early-onset solid tumors overall; individuals in the highest tertile of accelerated aging had roughly a 15% greater risk compared with the slowest-aging group.
- Organ-specific aging predicts specific cancers: Proteomics-based measures revealed that immune-system aging predicts early-onset lung cancer and adipose (fat) tissue aging predicts early-onset colorectal cancer.
- Effect independent of inherited genetics: The link between accelerated biological aging and higher early-onset cancer risk remained after accounting for inherited cancer risk genes and genetic predisposition to faster aging.
- Toward precision prevention: These biological-age metrics could inform targeted prevention and early-detection strategies by identifying high-risk young adults long before tumors develop.
Source: Washington University
Cancer incidence typically increases with chronological age because cellular damage accumulates over time. However, rising rates of cancer among younger adults have prompted researchers to investigate whether biological aging is accelerating across generations, making younger people biologically older than their chronological age would suggest.
A team led by researchers at Washington University School of Medicine in St. Louis reports that younger generations do, on average, display faster biological aging than earlier generations. Using comprehensive datasets and advanced biomarker algorithms, the team linked these generational shifts in biological age to increased early-onset cancer risk and to organ-specific vulnerabilities.
Exploring biological aging
The investigators examined systemic and organ-specific aging across birth cohorts to capture the cumulative effect of multiple risk factors—such as obesity, metabolic dysfunction, alcohol use, sedentary behavior and diet—acting together. Rather than relying on any single exposure, biological-age measures integrate diverse physiological changes that reflect lifetime environmental and lifestyle influences.
Data included 154,169 young adults from the UK Biobank and 10,262 participants from the U.S. All of Us Research Program. Systemic aging was estimated with established clinical-biomarker measures such as PhenoAge and the Klemera–Doubal Method, along with a metabolomic age score. PhenoAge combines nine routine blood biochemistry markers (for example, albumin and creatinine) to estimate physiological age relative to chronological years. Organ-specific aging used blood proteomic profiles to infer aging for particular tissues and systems.
The researchers calculated average “age gaps” (biological age minus chronological age) for each birth cohort and expressed differences relative to the standard deviation across individuals. These comparisons revealed consistent generational rises in systemic biological age and validated the pattern across alternative systemic measures and in the independent U.S. sample.
Notably, greater systemic age gaps corresponded to a measurable increase in early-onset solid cancer risk. The association persisted after adjusting for inherited genetic risk of cancer and genetic susceptibility to faster aging. When analyses focused on organ-specific aging, distinct links emerged: immune-system aging showed a strong association with early-onset lung cancer risk, while adipose-tissue aging associated with early-onset colorectal cancer.
Lead author Yin Cao and colleagues emphasize that early identification of younger people with accelerated biological aging could enable more precise prevention and earlier surveillance, shifting care from broad age-based screening toward personalized risk-based strategies.
This study is part of Team PROSPECT, a Cancer Grand Challenges-funded initiative that brings multidisciplinary researchers together to tackle complex causes of cancer at younger ages. The work supports the idea that rising early-onset cancer rates may reflect wider, population-level changes in biological aging driven by environmental, lifestyle and societal factors.
Researchers plan to continue investigating the environmental and behavioral contributors that produce lasting biological imprints and to test how biological-age metrics can guide tailored prevention, lifestyle interventions and targeted screening strategies to lower early-onset cancer risk.
Funding: This research was conducted by the PROSPECT team and supported by the Cancer Grand Challenges initiative, the National Cancer Institute and other funders, as acknowledged by the authors. The content reflects the authors’ findings and conclusions.
Key Questions Answered:
A: Chronological age is the number of years since birth. Biological age reflects the functional state of cells, tissues and organs based on physiological markers. A large age gap means a person’s body shows signs typical of someone older than their chronological years, which can increase disease vulnerability.
A: By analyzing biomarker-derived biological-age estimates across birth cohorts in large population datasets and comparing age gaps at equivalent chronological ages, the team found substantial generational increases in systemic biological aging—for example, a near one-standard-deviation rise in systemic aging for people born in the 1990s versus those born in the late 1960s in the U.S. sample.
A: Integrating systemic biomarker and organ-specific proteomic measures into clinical practice could identify healthy young adults with accelerated biological aging. These individuals could receive targeted prevention, lifestyle interventions and earlier, personalized screening so that cancers can be detected or prevented before they progress.
Editorial Notes:
- This article was edited and reviewed for clarity by the editorial team.
- The original journal paper was reviewed in full and additional context was added by staff.
About this aging and cancer research news
Author: James Goodwin
Source: WUSTL (Washington University School of Medicine)
Contact: James Goodwin – WUSTL
Image: The image is credited to Neuroscience News
Original Research: “Biological aging and generational shifts in early-onset cancer risk” by Ruiyi Tian, Xiaoyu Zong, Duo Ren, Stefani Tica, Daniel Hong, Oluseye Oduyale, Jason D. Buenrostro, Ramaswamy Govindan & Yin Cao. Published in Nature Medicine. DOI: 10.1038/s41591-026-04448-w
Abstract
Biological aging and generational shifts in early-onset cancer risk
Early-onset cancer incidence has risen across recent generations. Systemic and organ-specific aging capture cumulative exposure effects and offer an integrative approach to understand early-onset cancer risk. In 154,169 young adults from the UK Biobank, systemic aging measured by PhenoAge increased across birth cohorts (23% s.d. increase for those born 1965–1974 versus 1950–1954) and associated with early-onset solid cancer risk (hazard ratio per s.d. 1.08; 95% CI, 1.03–1.13), driven by lung, gastrointestinal and uterine cancers and independent of genetic risks. Findings were consistent across alternative systemic aging measures and were partially validated in 10,262 participants from the U.S. All of Us Research Program. Proteomics-based organ-specific analyses linked immune aging to early-onset lung cancer and adipose-tissue aging to early-onset colorectal cancer. Greater age gaps, reflecting more advanced biological aging relative to chronological age, may be a driver associated with higher early-onset solid cancer risk and highlight targets for prevention research.