BioStacks

Best Potassium for Heart

Top 10 products ranked

Last reviewed May 2026

Clinical dose: 99–500 mg

Why Potassium for Heart

Potassium plays a supporting role in heart. Primary intracellular electrolyte essential for maintaining fluid balance, nerve impulse transmission, and muscle contraction—including cardiac rhythm. Works in opposition to sodium: higher potassium intake helps lower blood pressure by promoting sodium excretion.

What dose to look for

Clinical studies typically use 99–500 mg of potassium. FDA limits OTC potassium supplements to 99 mg per dose form due to GI injury risk. Most potassium should come from food (RDA 3,400 mg). Clinical hypertension doses (2,000–4,000 mg) are from dietary sources, not supplements. Products below this range may not deliver meaningful results.

What the research says

Potassium has strong clinical evidence for heart benefits. Multiple trials confirm blood pressure reduction via sodium excretion; FDA limits supplements to 99mg/dose Learn more

Clinical research on Potassium

LOW — Essential electrolyte for BP regulation but supplementation evidence is limited · 500–1,000 mg/day supplemental (total dietary target: 2,600–3,400 mg/day)

•2017 meta-analysis found increased potassium intake (primarily dietary) reduced systolic BP by 4.5 mmHg in hypertensive adults. But most evidence is from dietary potassium, not supplements. PubMed
•WHO recommends potassium intake of ≥3,510 mg/day for adults to reduce blood pressure and cardiovascular risk. Most adults consume only ~2,500 mg/day.
•Supplement doses are limited (OTC max 99 mg per pill in the US) due to hyperkalemia risk, especially in patients with renal impairment or on ACE inhibitors/ARBs. Food-based potassium is preferred.

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