Associations between diet quality, epigenetic aging and epigenome: Findings from two population-based Studies
Tavares, J. F.; Liu, D.; Talevi, V.; Eichelmann, F.; Jannasch, F.; Schulze, M. B.; Aziz, N. A.; Nöthlings, U.; Breteler, M. M. B.
Show abstract
Several dietary patterns are suggested to benefit health, potentially through DNA methylation changes. However, to what extent adherence to so-called healthy diets overlaps, whether these dietary patterns are equally beneficial, and whether they affect health outcomes through the same molecular mechanisms, remains unclear. Therefore, we investigated the overlap in adherence to ten diet quality scores, and examined the associations of these scores with both biological aging markers and DNA methylation profiles. We used data from the Rhineland Study, a large population-based cohort, and validated our findings using corresponding data from the independent EPIC-Potsdam cohort. Interestingly, we found minimal overlap of participants in the top 25% of adherence across different diet quality scores. Adherence to a healthy dietary pattern was associated with reduced epigenetic age acceleration regardless of the specific dietary pattern, except for the EAT-Lancet diet. Different dietary patterns were associated with distinct methylation profiles, which however largely converged onto the same biological pathways. Our research thus indicates that general adherence to a healthy dietary pattern promotes health through similar epigenetic mechanisms, despite variations in dietary composition.
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