Summary: Researchers have identified a clear connection between accelerated biological aging and the rising incidence of early-onset cancers (diagnosed at age 55 or younger) in recent generations. The study analyzed biomedical and molecular data from more than 154,000 people in the UK Biobank and over 10,000 participants from the NIH’s All of Us Research Program to measure the gap between chronological age and biological age using blood biochemistry, metabolomics and proteomic algorithms such as PhenoAge.
By comparing chronological age with biological age — the physiological condition of tissues and organ systems — the team found that younger birth cohorts are biologically older than previous generations were at the same chronological age. This broader, systemic aging was linked with an 8% to 15% higher risk of early-onset solid tumors. The research also showed that accelerated aging in particular organ systems corresponds to specific cancers, for example accelerated immune aging with early-onset lung cancer and faster adipose (fat) tissue aging with early-onset colorectal cancer.
Key Facts
- Generational increase in biological age gap: In the UK sample, people born 1965–1974 had systemic aging 23% of one standard deviation higher than those born 1950–1954. In the U.S. sample, participants born 1990–1999 showed systemic aging 92% of one standard deviation higher than people born 1965–1969.
- Higher cancer risk with advanced systemic aging: Greater systemic biological aging corresponds to an 8% increase in risk of early-onset solid cancers per standard deviation of age gap; individuals with the most advanced systemic aging had about a 15% higher risk compared with the slowest-aging peers.
- Organ-specific aging predicts specific cancers: Proteomic measures revealed that advanced immune system aging is associated with early-onset lung cancer, while advanced adipose tissue aging is associated with early-onset colorectal cancer.
- Effects independent of inherited risk: The associations remained after controlling for inherited cancer risk genes and genetic predispositions for accelerated aging.
- Implications for prevention: Biological age metrics may enable targeted screening and prevention by identifying young, healthy people at elevated risk well before tumors appear.
Source: Washington University School of Medicine in St. Louis
Background: Why this matters
Cancer is commonly associated with older age because cellular damage accumulates over time. However, rising rates of cancer among younger adults have raised concern that modern exposures and lifestyles may be accelerating biological aging, increasing susceptibility to cancer earlier in life. This study, led by researchers at Washington University, provides evidence that biological aging has accelerated across recent generations and that this acceleration is linked to higher early-onset cancer risk.
Study design and data
The research evaluated more than 154,000 participants from the UK Biobank and over 10,000 participants from the U.S. All of Us Research Program. The investigators estimated biological age at two levels: systemic aging, which reflects body-wide physiological decline, and organ-specific aging, which focuses on the condition of individual organ systems using proteomic markers.
Systemic aging was measured using established algorithms including PhenoAge, the Klemera–Doubal Method, and a metabolomic age score derived from blood biomarkers. PhenoAge incorporates nine common blood chemistry markers such as albumin and creatinine to produce an integrative estimate of biological aging. Organ-specific aging estimates were derived from blood proteomics that quantify proteins linked to the immune system, adipose tissue and other organs.
Main findings
After adjusting for chronological age, the researchers calculated age gaps for birth cohorts and compared cohort averages using standard deviation units. The UK cohort born 1965–1974 had systemic aging 0.23 standard deviations higher than those born 1950–1954. In the U.S. cohort, participants born 1990–1999 had systemic aging 0.92 standard deviations higher than those born 1965–1969.
Across analyses, greater systemic aging was associated with a higher risk of early-onset solid tumors, especially lung, gastrointestinal and uterine cancers. The association persisted after accounting for genetic risks of cancer and genetic predisposition to fast aging. Organ-specific analyses linked immune aging with early-onset lung cancer and adipose tissue aging with early-onset colorectal cancer, highlighting biological pathways that may underlie organ-specific vulnerability.
Implications for prevention and screening
The researchers suggest that biomarker-based assessments of biological age could be integrated into preventive care to identify younger adults at elevated risk and to tailor screening and intervention strategies. Rather than relying solely on chronological age thresholds, clinicians could use systemic and organ-specific aging profiles to prioritize early detection and personalized risk-reduction measures for individuals biologically predisposed to earlier cancer onset.
“Our aim is to understand how modern environments become biologically embedded to drive cancer risk, so we can move from broad recommendations to personalized prevention,” said Yin Cao, ScD, one of the study leads.
Frequently asked questions
Q: What is the age gap measured in this study?
A: The age gap is the difference between chronological age (years lived) and biological age (physiological condition estimated from biomarkers and proteomics). A larger age gap means a person’s biology appears older than their calendar age.
Q: How did researchers demonstrate generational acceleration in aging?
A: The team compared biological age indicators across birth cohorts in large biomedical datasets and quantified differences using standard deviations. They observed consistent increases in systemic biological aging among more recent birth cohorts at equivalent chronological ages.
Q: How can these findings change cancer screening?
A: Incorporating systemic biomarker tests and organ-specific proteomics into routine prevention could identify young adults at higher biological risk and allow targeted, personalized screening and lifestyle or therapeutic interventions well before cancer develops.
Funding and contributions
Funding: This work was part of the PROSPECT team supported by the Cancer Grand Challenges initiative funded by Cancer Research UK and the National Cancer Institute of the NIH, with additional support from the French National Cancer Institute, the Bowelbabe Fund for Cancer Research UK, NIH grants (including R37CA246175 and P30DK052574), related training grants, the Siteman Cancer Center and the Foundation for Barnes-Jewish Hospital. The content is the responsibility of the authors and does not necessarily reflect official NIH views.
About the research article
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 (condensed): Incidence of early-onset cancer has risen in recent generations. Systemic and organ-specific biological aging, reflecting cumulative exposures, may help explain this trend. In 154,169 participants from the UK Biobank, PhenoAge increased across birth cohorts and associated with early-onset solid cancer risk (hazard ratio per standard deviation 1.08), driven by lung, gastrointestinal and uterine cancers and independent of genetic risks. Findings were consistent across alternative systemic aging measures and validated in part in 10,262 U.S. All of Us participants. Proteomics-based analyses connected immune aging with early-onset lung cancer and adipose aging with early-onset colorectal cancer. Greater biological age gap may be a modifiable driver of early-onset cancer risk and a target for prevention strategies.