Summary: Researchers established a critical link between accelerated biological aging and the rising incidence of early-onset cancers (diagnosed at age 55 or younger) in recent generations. The research analyzed biomedical and molecular data from over 154,000 individuals in the UK Biobank and more than 10,000 participants from the NIH’s All of Us Research Program.
By measuring the gap between chronological age and biological age, using advanced blood biochemistry and proteomic algorithms like PhenoAge, the team discovered that younger birth cohorts are aging significantly faster than their predecessors did at the same chronological age. This advanced systemic aging was associated with an 8% to 15% increased risk of early-onset solid tumors, while localized, organ-specific aging directly correlated with specific malignancies, such as accelerated immune system aging driving early-onset lung cancer.
Key Facts
- The Generational Age Gap Escalation: In the UK cohort, individuals born between 1965 and 1974 showed systemic aging 23% of one standard deviation higher than those born between 1950 and 1954. In the U.S. cohort, the trend exploded, with individuals born between 1990 and 1999 showing systemic aging 92% of one standard deviation higher than those born between 1965 and 1969.
- Direct Cancer Risk Amplification: Advanced systemic biological aging corresponds to an 8% baseline increase in early-onset solid tumors (particularly gastrointestinal, lung, and uterine cancers). Individuals in the highest tier of accelerated aging experienced a 15% surge in risk compared to their biologically slower-aging peers.
- Organ-Specific Aging Blueprints: Rather than generic cellular breakdown, specific organ systems targeted specific cancers. Advanced aging of the immune system uniquely drives early-onset lung cancer, while accelerated aging of adipose (fat) tissue predicts early-onset colorectal cancer.
- Independence From Genetics: The heightened cancer risk tied to accelerated biological aging persisted even after researchers controlled for inherited cancer risk genes and genetic predispositions to fast aging.
- Moving Toward Precision Prevention: Led by Team PROSPECT under the global Cancer Grand Challenges initiative, these biological age metrics provide clinical tools to identify high-risk, healthy young adults long before tumors form, transforming preventive medicine.
Source: Washington University
Cancer is often considered a disease of aging. Older adults are at higher risk because they have had more time to accumulate cellular damage that can trigger tumor formation. But as cancer rates in younger adults rise, with each successive generation facing higher risks than the one before it, researchers are asking whether cellular damage is accumulating faster in recent generations, accelerating their body’s biological aging.
A new study led by researchers at Washington University School of Medicine in St. Louis provides evidence that younger generations are indeed aging faster biologically than their older counterparts. The causes remain under investigation around the world, including global efforts led by research members of Siteman Cancer Center, based at Barnes-Jewish Hospital and WashU Medicine, and Cancer Grand Challenges, a global initiative co-founded by the National Cancer Institute and Cancer Research U.K.; but importantly, the new research links this accelerated aging to an increased risk of early-onset cancers in younger generations. In general, early-onset cancers are those diagnosed at age 55 or younger.
The larger the gap between biological age — that is, how old our bodies appear to be — and chronological age — which is how many years we have actually lived — the higher the cancer risk, according to the researchers. They found that people in more recent birth cohorts had larger age gaps than those in older birth cohorts, which may help explain the rise in early-onset cancer in recent generations.
Their study also identified links between faster aging in particular organ systems and increased risks for certain cancers. For instance, an immune system that appears older than its actual age was associated with early-onset lung cancer. Similarly, fat tissue that appears older than its chronological age was associated with early-onset colorectal cancer.
The study, published June 22 in the journal Nature Medicine, suggests that measures of accelerated aging could help identify individuals at higher risk of early-onset cancer and guide new strategies for cancer prevention and early detection.
“Our ultimate goal is to decode how modern environments become biologically embedded to drive cancer risk, transforming prevention from broad recommendations to personalized interventions,” said Yin Cao, ScD, a molecular epidemiologist and an associate professor of surgery and of medicine at WashU Medicine.
“This brings us closer to identifying risk earlier and developing prevention strategies that are tailored to an individual’s biology.”
Exploring biological aging
Cao’s team has been at the forefront of identifying individual factors that influence cancer risk across the life course, such as obesity, metabolic dysregulation, alcohol consumption, sedentary behavior, poor diet quality and cesarean delivery. Although these discoveries have revealed important clues to the origins of cancer at younger ages, the contribution of any single factor is modest.
With that in mind, Cao, also a research member of Siteman, and her colleagues have sought ways to capture the influence of multiple risk factors operating together to spur cancer development. With support from Cancer Grand Challenges, Cao, as co-lead of Team PROSPECT, has been able to go after this problem.
For the current study, Cao’s team analyzed data from more than 154,000 young adults in the UK Biobank, a large biomedical dataset containing biological, health and lifestyle data, and from more than 10,000 individuals in the U.S. participating in the National Institutes of Health’s (NIH) All of Us Research Program, an effort to build a comprehensive health dataset on more than 1 million people living in the U.S.
To estimate the level of biological aging — or age gap — the researchers, including first author Ruiyi Tian, a doctoral student in the Cao lab, examined aging at two levels: across the body as a whole, known as systemic aging, and within individual organs, known as organ-specific aging.
For systemic aging, the researchers used established measures, including clinical biomarker-based measures such as PhenoAge and the Klemera-Doubal Method, as well as a metabolomic age score, which provides a measure of individual metabolism.
PhenoAge, for example, measures nine blood biochemistry markers such as albumin, made by the liver, and creatinine, a waste product removed by the kidneys. For organ-specific aging, the researchers used blood proteomic data, which measure levels of multiple proteins linked to specific organ systems, to estimate biological aging in individual organs.
The researchers calculated the average age gap for each birth cohort and used standard deviation to describe how much each group differed from the study average. Standard deviation is a measure of how spread out data points are around the average.
The researchers found that individuals in the UK born between 1965 and 1974 had systemic aging that was 23% of one standard deviation higher compared with those born between 1950 and 1954, after accounting for chronological age. In other words, people in the younger birth cohort showed a modest shift toward older biological profiles than people in the older birth cohort when at the same chronological age.
The researchers observed a similar pattern in the U.S cohort. Participants born between 1990 and 1999 had systemic aging that was 92% of one standard deviation higher compared with those born between 1965 and 1969.
This increased systemic aging in the younger group was associated with an 8% increased risk of early-onset solid cancers, especially lung, gastrointestinal and uterine cancers. When participants were divided into three groups based on their level of systemic aging, those with the most advanced systemic aging had a 15% increased risk of early-onset solid cancer compared with those with the least advanced systemic aging. According to the analysis, the increased risk persisted even after controlling for inherited genetic risks of cancer and genetic susceptibility to accelerated aging.
By zooming into organ-specific aging, the researchers found that advanced immune system aging was associated with increased risk of early-onset lung cancer, and advanced adipose (fat) tissue aging was associated with increased risk of early-onset colorectal cancer.
“If we can identify younger people with the highest cancer risk when they are still healthy, we can focus on prevention and early-detection strategies for the individuals who will benefit most from early interventions,” Cao said.
This research is part of Team PROSPECT, a Cancer Grand Challenges team co-led by Cao. Cancer Grand Challenges is a global research funding initiative co-founded by Cancer Research UK and the National Cancer Institute (NCI) that brings together world-leading researchers to take on cancer’s toughest challenges.
“Right now, we don’t have a definitive answer to what’s driving the rise of early-onset cancers around the world, but studies like this are helping us piece together the bigger picture, showing that cancer may be influenced not just by changes inside individual cells, but by wider changes happening across the body as a whole,” said David Scott, PhD, director of Cancer Grand Challenges.
“Research on this scale is possible through Cancer Grand Challenges, which brings together scientists from different fields around the world to tackle these complex questions together.”
Cao and her colleagues are leading efforts to transform the understanding of why cancers are increasingly striking younger generations. Their next frontier is to decipher how environmental, lifestyle and societal changes leave lasting biological imprints, including accelerated aging and other markers of heightened susceptibility.
By illuminating the pathways through which risk accumulates across the life course, they seek to uncover the origins of early-onset cancers and redefine opportunities for prevention. In parallel, their work will enable more precise approaches to identify those at greatest risk and intervene earlier, shifting the paradigm from reacting to disease to preventing it before it begins.
Funding: This work was part of the PROSPECT team supported by the Cancer Grand Challenges initiative funded by Cancer Research UK, grant numbers CGCATF-2023/100043 and CGCATF-2023/100037; the National Cancer Institute of the NIH, grant numbers OT2CA297577 and OT2CA297576; the French National Cancer Institute; and the Bowelbabe Fund for Cancer Research UK. The project was also supported by grants from NIH/National Cancer Institute, grant number R37CA246175; the NIH/National Institute of Diabetes and Digestive and Kidney Diseases, grant number P30DK052574; the Alvin J. Siteman Cancer Center through the Foundation for Barnes-Jewish Hospital. Further support was provided by a pre-doctoral fellowship in the Cancer Biology pathway supported by NIH Molecular Oncology Training Grant T32CA113275 to Washington University School of Medicine in St. Louis; the Pediatric Gastroenterology Research Training Program grant T32DK077653 to Washington University School of Medicine in St. Louis; the Washington University School of Medicine in St. Louis Institute of Clinical and Translational Sciences, grant number UL1TR002345; and the Foundation for Barnes-Jewish Hospital. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH.
Key Questions Answered:
A: Chronological age is simply the rigid number of years a person has been alive based on their birth date. Biological age, however, refers to the physiological state and functional integrity of an individual’s cells, tissues, and organs. When modern lifestyle and environmental pressures cause our internal biochemistry to degrade prematurely, a large “age gap” opens up, meaning a 35-year-old individual could possess the biological profile and vulnerability of a 50-year-old.
A: The team tracked identical chronological milestones across different birth cohorts using immense biomedical datasets in the U.S. and UK. By calculating standard deviations of biological age indicators like PhenoAge, they discovered a striking generational acceleration. Individuals born in the 1990s showed systemic biological aging nearly a full standard deviation (92%) higher than individuals born in the late 1960s when measured at equivalent points in their lives.
A: Currently, cancer screening protocols (like colonoscopies or lung scans) are dictated almost entirely by broad chronological age cutoffs. By integrating systemic biomarker tests and organ-specific proteomic profiles into routine preventative medicine, physicians can identify healthy young adults who are biologically aging at an accelerated rate. This enables highly personalized, proactive screening and targeted lifestyle or therapeutic interventions decades before a tumor can manifest.
Editorial Notes:
- This article was edited by a Neuroscience News editor.
- Journal paper reviewed in full.
- Additional context added by our staff.
About this aging and cancer research news
Author: James Goodwin
Source: WUSTL
Contact: James Goodwin – WUSTL
Image: The image is credited to Neuroscience News
Original Research: Open access.
“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. Nature Medicine
DOI:10.1038/s41591-026-04448-w
Abstract
Biological aging and generational shifts in early-onset cancer risk
Incidence of early-onset cancer is rising globally in recent generations, which underscores the need to elucidate the influence of emerging generational risk factors. Systemic and organ-specific aging reflects the cumulative impact of exposures and may provide an integrative and complementary approach to understand early-onset cancer risk.
Here among 154,169 young adults from the United Kingdom Biobank, systemic aging measured by PhenoAge increased across birth cohorts, with 23% s.d. increase for those born 1965–1974 versus 1950–1954, and was associated with early-onset solid cancer risk (hazard ratio (HR)per s.d. 1.08; 95% confidence interval (CI), 1.03–1.13), driven by lung, gastrointestinal and uterine cancers, independent of genetic risks of aging and cancer.
Patterns were consistent using alternative systemic aging measures, including the Klemera–Doubal method-defined age gap and metabolomic-based age gap. These findings were validated partially among 10,262 participants in the United States All of Us Research Program. Proteomics-based organ-specific aging analyses linked immune aging with early-onset lung cancer (HRper s.d. 1.89; CI, 1.20–2.97) and adipose tissue aging to early-onset colorectal cancer (HR 1.60; CI, 1.11–2.32).
Greater age gap, reflecting more advanced biological aging relative to chronological age, may serve as a driver associated with risk of early-onset solid cancers, highlighting the importance of uncovering underlying mechanisms to guide effective prevention strategies.
