MineralNo.019
Potassium
Blood pressure, fluid balance, muscle & nerves.
Typical / RDA2,600–3,400 mg
Upper limitCaution (OTC ~99mg)
EvidenceModerate
How to take it
Timing With a mealFood YesForm Food first
What to know
Best obtained from food (bananas, potatoes, beans, leafy greens). OTC pills are capped low for safety because excess potassium can dangerously affect heart rhythm.
Interactions & cautions
- Risky with kidney disease and certain BP/heart meds — get medical advice.
Do you actually need it?
Get it from food, not pills, unless a doctor directs otherwise.
Questions people ask about potassium
- Potassium vs Electrolytes: Do You Need Both?Electrolyte supplements typically include potassium, making a separate potassium pill often unnecessary. Most people get enough potassium from food.
- Can you take too much potassium every day?Yes, it's possible to take too much potassium, particularly from supplements, due to its impact on heart rhythm. Most people get enough from food.
Reference values: NIH Office of Dietary Supplements, adult general population. Educational information only — not medical advice. Confirm with a healthcare professional.