Hormonal
Habitual consumption of tuna or other broiled/baked fish (dietary omega-3 fatty acids) is associated with favorable Heart Rate Variability (HRV) indices, specifically indicating greater vagal tone, moderated baroreceptor responses, and reduced erratic sinoatrial node firing in older adults.
To support heart rhythm health and autonomic balance, aim to consume tuna or other broiled/baked fish regularly (e.g., 1-2 times per week or more). This dietary pattern is associated with improved vagal tone and more stable heart rhythm patterns, which may contribute to a lower risk of cardiac death. Avoid fried fish preparations, as they did not show these benefits.
After multivariable adjustment, consumption of tuna or other broiled/baked fish was associated with specific HRV components, including indices suggesting greater vagal predominance and moderated baroreceptor responses... and less erratic sinoatrial node firing
Why this rating
Large population-based cohort (n>4000), prospective design, multivariable adjustment, but cross-sectional HRV assessment limits causal inference.
Source
Dietary Fish and ω-3 Fatty Acid Consumption and Heart Rate Variability in US Adults
Dariush Mozaffarian et al. · Circulation · 2008
DOI 10.1161/circulationaha.107.732826
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