Diet quality, accelerated aging and cardiovascular disease in 52,718 UK Biobank participants
In 52,718 UK Biobank participants followed for a mean of 12 years, accelerated biological aging statistically mediated part of the association between four diet-quality indices and both incident cardiovascular disease and cardiovascular death. This is an observational mediation analysis, not evidence that diet causes these outcomes. [1]
Automatic summary · not editorially reviewed
The key findings
The analysis included 52,718 UK Biobank participants followed for a mean of 12 years. [1]
Accelerated aging significantly mediated the associations between diet quality and both incident CVD and CVD mortality across the four indices. [1]
The proportion mediated ranged from 21.81% to 40.84% for incident CVD and from 16.67% to 35.87% for CVD mortality. [1]
The source at a glance
- Study type / format
- Prospective observational cohort mediation analysis (abstract)
- Population / context
- 52,718 UK Biobank cohort participants
- Summary based on
- Study abstract
- Original publication
- September 20, 2026
Diet indices and aging measures in UK Biobank
The researchers asked whether accelerated aging helps explain the link between diet quality and cardiovascular disease (CVD). Data came from the UK Biobank cohort. Diet quality was scored with four established indices: the Healthy Eating Index-2020, the Alternative Healthy Eating Index, the Dietary Approaches to Stop Hypertension index and the Mediterranean Diet Score. Accelerated aging was assessed with Phenotypic Age Acceleration and Biological Age Acceleration. Outcomes were incident CVD and CVD mortality. Analyses used multivariable linear regression, Cox proportional hazards models and formal mediation analysis, with subgroup analyses by sex, age and CVD subtype.
Supporting source [1]
Mediated proportions for incident CVD and CVD death
The analysis included 52,718 participants followed for a mean of 12 years. Across all four diet indices, accelerated aging significantly mediated the associations between diet quality and both incident CVD and CVD mortality. The proportion mediated ranged from 21.81% to 40.84% for incident CVD and from 16.67% to 35.87% for CVD mortality. The authors describe accelerated biological aging as a potential intermediate pathway and aging-related physiological dysregulation as a potential target for future dietary intervention research.
Supporting source [1]
Observational design limits causal claims
This was a prospective mediation analysis within an observational cohort, so the mediation estimates describe statistical pathways, not proven causal mechanisms. The abstract reports the mean follow-up of 12 years but gives no details on how diet was repeatedly measured, on residual confounding or on the full-text methods. The authors call for stratification by sex, age and disease subtype to develop more precise dietary guidelines; that is a research recommendation, not personal advice.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. This is an observational cohort mediation analysis, so associations and mediated proportions are not proof of causation. The abstract does not report how diet was measured over time, residual confounding, or model details.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Yu J, Zhu Z, Qi X, Lu H, Wu B. · europepmc.org · September 20, 2026