[REVISION HISTORY]

Plant-Based Diets and Epigenetic Aging

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2026-08-07 21:55 UTC → 2026-08-10 23:12 UTC · added ~~removed~~

In early August 2026, a randomized trial by UC San Diego and the University of Freiburg compared a vegan diet with a meat‑rich diet in 48 adults over four weeks. DNA‑methylation analysis showed reduced neutrophils, higher CD4 T‑cell proportions, lower inflammatory markers, and a measurable slowing of biological age, indicating that short‑term dietary changes can affect molecular aging processes. A few days later, a separate eight‑week study of identical twins on a vegan diet reported similar reductions in DNA‑methylation age acceleration, along with improvements in inflammation, cardiovascular, liver, hormonal, and metabolic health. Researchers linked these benefits partly to greater weight loss among vegan participants and highlighted the relevance of whole‑food, plant‑based and flexitarian eating patterns. The study called for longer‑term investigations to confirm the durability of the observed effects. Further details published in the journal MedComm regarding the UC San Diego study noted that researchers analyzed over 800,000 sites of DNA methylation. Associate professor of neuroscience Jerome Mertens observed that the epigenome responded within just four weeks, stating that the results demonstrate “how human biology can be sensitive to daily dietary decisions.” Together, the ~~two~~ studies reinforce emerging evidence that plant‑centric diets may decelerate epigenetic aging and improve multiple health markers, while also underscoring the need for extended research to establish lasting outcomes.

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