Review links air pollution to biological aging across biomarker classes
This review reports that air pollution is linked to accelerated biological aging, with the most consistent associations for system-level composite measures such as Klemera-Doubal biological age, PhenoAge and frailty; epigenetic clock findings remain inconclusive. [1]
Automatic summary · not editorially reviewed
The key findings
The review states that air pollutants appear to affect hallmarks of aging such as oxidative stress, inflammation, epigenetic dysregulation, telomere attrition, mitochondrial dysfunction and cellular senescence. [1]
System-level composite measures, particularly Klemera-Doubal biological age, PhenoAge and frailty scores, show the most robust and consistent associations with air pollution. [1]
Epigenetic clock findings remain inconclusive at the meta-analytic level, and causal mediation analyses across independent cohorts support biological aging as a pathway to clinical outcomes. [1]
The source at a glance
- Study type / format
- Review (abstract only)
- Population / context
- People exposed to ambient and household air pollution, as covered by the reviewed epidemiological and mechanistic evidence.
- Summary based on
- Study abstract
- Original publication
- August 19, 2026
Air pollution and hallmarks of aging
The review describes air pollution as the leading environmental cause of disease burden worldwide and as increasingly recognized as a driver of accelerated biological aging. It states that pollutants appear to affect fundamental hallmarks of aging, including oxidative stress, chronic inflammation, epigenetic dysregulation, telomere attrition, mitochondrial dysfunction and cellular senescence. The pollutants named as of greatest concern are fine and ultrafine particulate matter (PM 2.5 and PM 0.1), traffic-related air pollution and household combustion emissions.
Supporting source [1]
Strongest links for composite biological age measures
The review synthesizes epidemiological and mechanistic evidence across molecular, system-level and whole-organism biomarker classes. It reports that the strength of evidence varies meaningfully between classes: system-level composite measures, particularly Klemera-Doubal method biological age, PhenoAge and frailty scores, show the most robust and consistent associations with air pollution. Causal mediation analyses across independent cohorts are said to support biological aging as a pathway linking air pollution exposure to clinical outcomes including cardiovascular disease, neuropsychiatric disorders and chronic kidney disease.
Supporting source [1]
Inconclusive clocks, life-course windows and research gaps
Epigenetic clock findings are described as inconclusive at the meta-analytic level despite strong biological plausibility, possibly reflecting differences in exposure assessment, study design and cell composition of the target tissue. Prenatal and early-life exposures are said to shape biological aging trajectories that persist into later life. Named research gaps include underrepresentation of household air pollution and low-income settings and a shortage of longitudinal multimarker or multi-omics designs. Air quality improvements and clean cooking fuel transitions are reported to partially reverse pollution-associated aging acceleration.
Supporting source [1]
How to interpret this
This is an abstract of a review; the full text was not reviewed. The abstract reports no primary sample, follow-up duration or effect sizes, and the associations described are not established causes.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Poursafa P, Jylhävä J. · europepmc.org · August 19, 2026