Minerals
Potassium
In plain language
An essential mineral for heart rhythm and muscle function. Best gotten from food - high-dose pills are tightly restricted because of heart risk.
Is it an approved medication?
No — not an approved medication
No - but high-dose potassium is usually a doctor-supervised, not casual OTC, matter
How strong is the evidence?
Strong for blood pressure at normal dietary levels
The main thing to know
Don't self-supplement at high doses - too much potassium can be dangerous for the heart.
Mechanism
Major intracellular cation; regulates fluid balance, nerve conduction, and vascular tone; counteracts sodium's effect on blood pressure.
Potential benefits
- Blood pressure reduction (particularly in high-sodium diets)
- Reduced stroke risk (dietary intake)
Regulatory status
Dietary supplement (low-dose OTC); higher-dose forms often prescription due to cardiac risk