“Potassium?”Here!
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As a supplement
Talk to your doctor or pharmacist.
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A mineral electrolyte found widely in fruits and vegetables, added to supplements typically as potassium chloride, citrate, or other salts.
Why it’s used
Taken to support normal fluid balance, nerve signaling, and muscle contraction, and to help meet intake in diets low in fruits and vegetables.
What the evidence is for
supporting normal fluid balance and nerve/muscle function.
What the evidence says
NIH ODS describes potassium's physiological role as well established, with observational evidence linking adequate intake to lower blood pressure. Direct trial evidence on potassium supplements specifically, rather than dietary potassium, is more limited.
Dose studied
2600–3400 mg — adequate intake range for adult men and women, per NIH ODS.
Context
Most research on potassium and blood pressure examines dietary intake patterns rather than isolated supplement doses, and supplement forms are typically limited in strength for safety reasons.
Rumors
Supporting normal fluid balance and nerve/muscle function.
Supports — establishedhealth and safety evidence
Measured as a biomarker.
- Potassium — Fact Sheet for Health Professionals (Regulatory) · Funding not checked
How much is a reference amount
- 2,600 mg a dayfor adults 19 and over, women · Adequate Intake
No upper limit has been set — the data was not sufficient to set one, which is a gap in the research rather than a finding about safety.
- 3,400 mg a dayfor adults 19 and over, men · Adequate Intake
No upper limit has been set — the data was not sufficient to set one, which is a gap in the research rather than a finding about safety.
The 2019 committee set no UL for potassium. The legacy corpus stored 2600–3400 as a range; it is the AI for women and the AI for men.
Every applicable line is shown because we don’t know which one is yours, and a reference intake is a target for a population, not a threshold for harm.