Potassium for Stroke Risk Reduction

Research suggests that the relationship between potassium and stroke risk is not straightforward, and the studies linked here provide only indirect or tangential evidence on this question. One pilot observational study found that men who had experienced acute ischemic stroke actually showed higher hair concentrations of potassium than healthy controls, running counter to the commonly held assumption that higher potassium status is protective, though hair mineral analysis has recognized methodological limitations and this finding should be interpreted cautiously given the small sample size. Several of the remaining studies are computational modeling investigations focused on potassium ion channels in the heart, exploring how disruptions to these channels affect electrical signaling, arrhythmia risk, and atrial fibrosis — conditions that can indirectly relate to cardioembolic stroke risk — but these are mechanistic simulations rather than clinical trials testing potassium intake or supplementation. Taken together, the body of evidence presented here does not include randomized controlled trials, meta-analyses, or large prospective cohort studies directly examining potassium supplementation or dietary potassium and stroke outcomes, meaning no reliable conclusions about potassium's role in stroke risk reduction can be drawn from this particular set of studies.