15-year epigenetic aging trajectories and midlife brain health in 2,833 adults
In 2,833 middle-aged adults, faster 15-year epigenetic aging trajectories were associated with worse cognition, while slower trajectories were linked to cognitive resilience and more favorable Alzheimer biomarker profiles. [1]
Automatic summary · not editorially reviewed
The key findings
The study analyzed 2,833 middle-aged adults with at least three DunedinPACE epigenetic clock measurements over 15 years. [1]
Fast Agers had slopes more than 1 standard deviation above the mean and showed worse processing speed, memory, executive function and global cognition than Typical Agers. [1]
Slower biological aging trajectories were associated with cognitive resilience and more favorable Alzheimer disease biomarker profiles. [1]
The source at a glance
- Study type / format
- Observational study reported in an abstract
- Population / context
- 2,833 middle-aged adults, mean baseline age 40 years, 59% female and 44% Black.
- Summary based on
- Study abstract
- Publication status
- Preprint · peer-review status not confirmed
- Original publication
- July 18, 2026
Trajectories over 15 years in midlife adults
The study asked whether changes in biological aging over time, not just a single measurement, relate to brain health. It analyzed 2,833 middle-aged adults with a mean baseline age of 40 years; 59% were female and 44% Black. Participants had at least three DunedinPACE measurements, an epigenetic clock based on DNA methylation, collected over 15 years. The authors note that most earlier studies used single-time-point clock measurements rather than dynamic change over time.
Supporting source [1]
Fast versus typical versus slow agers compared
Using mixed-effects modeling, the researchers derived individual slopes of epigenetic aging and grouped participants: Fast Agers had slopes more than 1 standard deviation above the mean, Slow Agers below, and Typical Agers in between. Compared with Typical Agers, Fast Agers showed worse processing speed, memory, executive function and global cognition. Trajectories were associated with multiple cognitive domains and Alzheimer disease biomarkers. Slower agers showed cognitive resilience and more favorable biomarker profiles.
Supporting source [1]
Associations, not causes, from an abstract
The authors describe these as associations: faster epigenetic aging trajectories went together with worse cognitive performance, and slower trajectories with resilience. The design is observational, so it does not show that epigenetic aging causes cognitive differences. The abstract reports the sample, the 15-year measurement window and the grouping, but gives no effect sizes or confidence intervals. Only the abstract was reviewed; the full text was not reviewed.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. This is an observational study reporting associations, not causes. The abstract gives no effect sizes or confidence intervals.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Boeriu AI, Andrews SJ, Hoang T, Bae S, Yaffe K. · europepmc.org · July 18, 2026