BioStacks

Best Potassium for Hydration

Top 9 products ranked

Last reviewed May 2026

Clinical dose: 99–500 mg

Why Potassium for Hydration

Potassium plays a key role in hydration. 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 hydration benefits. Multiple trials confirm blood pressure reduction via sodium excretion; FDA limits supplements to 99mg/dose Learn more