Vitamins & minerals
Potassium
Names you may see: potassium citrate chloride gluconate electrolyte
The quick take
Potassium supports normal nerve signalling, muscle contraction and fluid balance.
A closer look
What forms will I see on a label?
Labels may list potassium citrate, chloride or gluconate. Compare the declared potassium amount, including potassium-containing salt substitutes.
Why people use it
People choose potassium to address inadequate intake or as part of electrolyte formulas. A supplement is not automatically needed for everyday exercise.
These are common goals and marketing uses. The evidence section below explains what research supports.
What does the evidence tell us?
Adequate potassium is important, but evidence about dietary intake should not be treated as proof that a high-dose supplement improves workouts.
What should I know before using it?
Kidney disease and some medicines can cause potassium to accumulate dangerously. Check with a clinician before supplementing if these apply, including when using salt substitutes.
Sources & further reading
NIH Office of Dietary Supplements ↗
Content reviewed: September 30, 2026
General educational information. Follow the product label and seek individual advice when needed.