Heart health evidence brief
Potassium is an essential electrolyte involved in fluid balance, nerve function, and blood pressure regulation. Supplements are usually considered for blood pressure support, but food sources are often preferred.
Higher potassium intake can support blood pressure control, especially in people with hypertension or low dietary potassium, but food and overall diet pattern are the usual first step.
BMJ meta-analysis: increased potassium intake lowered systolic blood pressure by about 3.5 mmHg and diastolic by about 2.0 mmHg in adults.
Prioritize potassium-rich foods unless a clinician recommends supplementation; potassium chloride and high-dose supplements require more caution.
Kidney disease, ACE inhibitors, ARBs, potassium-sparing diuretics, and heart conditions can make extra potassium dangerous.
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