Systematic review links modifiable exposures to faster epigenetic age in adults
In this abstract, a systematic review and meta-analysis of 83 studies in adults found adverse modifiable exposures associated with accelerated epigenetic age; the proposed MEAB-Index estimated a cumulative preventable burden of +1.566 years. [1]
Automatic summary · not editorially reviewed
The key findings
The review included 83 studies in adults aged 18 or older, providing 118 distinct exposure-clock associations. [1]
In Pool A (n = 60), adverse modifiable exposures were associated with accelerated epigenetic age acceleration, pooled β = +0.310 years per unit exposure (95% CI 0.255–0.366). [1]
The proposed MEAB-Index estimated a cumulative preventable burden of +1.566 years (bootstrap 95% CI 1.011–2.123). [1]
The source at a glance
- Study type / format
- Systematic review and meta-analysis (abstract).
- Population / context
- Adults aged 18 or older in the included studies.
- Summary based on
- Study abstract
- Original publication
- June 2, 2026
Adults, epigenetic clocks and modifiable exposures
The review asked how strongly modifiable behavioral, environmental and social factors relate to epigenetic age acceleration (EAA), a DNA-methylation-based measure of biological age. Only studies in adults aged 18 or older were eligible, and EAA had to be measured with validated clocks (Horvath, PhenoAge, GrimAge, DunedinPACE). The authors searched PubMed/MEDLINE and Scopus from inception to 7 April 2026 for English-language observational and interventional studies reporting quantitative associations. They included 83 studies providing 118 distinct exposure-clock associations.
Supporting source [1]
Pooled associations and proposed preventable burden
In the primary analysis (Pool A, n = 60), adverse modifiable exposures were associated with accelerated EAA: pooled β = +0.310 years per unit of exposure (95% CI 0.255–0.366). The strongest associations were for metabolic and inflammatory markers (β = +0.913) and environmental exposures (β = +0.466). The newly proposed Modifiable Epigenetic Aging Burden Index (MEAB-Index) gave a cumulative preventable burden of +1.566 years (bootstrap 95% CI 1.011–2.123). Results were robust in sensitivity analyses and directionally consistent in secondary pools B–D. These are associations, not proof that changing a factor causes the change in EAA.
Supporting source [1]
Abstract-only scope and proposed framework
The abstract describes this as the most comprehensive quantitative synthesis to date and says EAA is meaningfully shaped by behavioral, environmental and social determinants. It suggests that reducing key modifiable risk factors, particularly metabolic/inflammatory and environmental exposures, could slow biological aging at the population level. The MEAB-Index is presented as a novel framework for estimating preventable burden and prioritizing interventions, not as a validated or approved tool. This explainer is based only on the abstract; the full text was not reviewed, so details of study quality, heterogeneity and publication bias cannot be checked here.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. The abstract does not report study-level quality, heterogeneity values or publication-bias results, and the MEAB-Index is a proposed framework, not a validated tool. Associations do not establish causation.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Aliberti SM, Marigliano P, Capunzo M. · europepmc.org · June 2, 2026