Summary:
Dietary phytochemicals are naturally occurring compounds in plants that have been linked to potential health benefits, including reduced inflammation, cholesterol regulation and cellular ageing. Alkaloids are a major group of phytochemicals with strong biological activity and have been investigated for their potential role in conditions such as cancer, type 2 diabetes and inflammation. Coffee and cocoa contain several alkaloids, including caffeine, theobromine and related compounds. Theobromine, which is found in higher concentrations in cocoa, has previously been associated with improved health outcomes and increased lifespan in laboratory studies. However, the mechanisms through which theobromine may influence human health and ageing are not fully understood. This observational study investigated whether blood levels of theobromine were associated with biological markers of ageing. The study analysed data from two datasets, including 509 participants from one and 1,160 participants from the other. Researchers examined whether theobromine levels were linked to epigenetic markers of ageing, which measure biological changes in DNA that occur over time. Higher blood concentrations of theobromine were associated with slower epigenetic ageing. These findings were consistent across both study populations and appeared to be specific to theobromine rather than other coffee and cocoa-related compounds. The findings suggest that the potential health benefits associated with cocoa and theobromine may extend to molecular processes involved in ageing. Further research is needed to determine whether increasing dietary intake of theobromine can directly influence ageing-related outcomes.
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Abstract:
Theobromine, a commonly consumed dietary alkaloid derived from cocoa, has been linked to extended lifespan in model organisms and to health benefits in humans. We examined associations between circulating levels of theobromine intake, measured using serum metabolomics, and blood-based epigenetic markers of biological ageing in two European human population-based cohorts. Serum theobromine levels were significantly associated with reduced epigenetic age acceleration, as measured by GrimAge (p < 2e-7) and DNAmTL (p < 0.001) in 509 individuals from the TwinsUK cohort, and both signals replicated in 1,160 individuals from the KORA cohort (p = 7.2e-08 and p = 0.007, respectively). Sensitivity analyses including covariates of other cocoa and coffee metabolites suggest that the effect is specific to theobromine. Our findings indicate that the reported beneficial links between theobromine intake on health and ageing extend to the molecular epigenetic level in humans.
Article Publication Date: 10/12/2025
DOI: 10.18632/aging.206344
