Potassium (K)
Primary intracellular electrolyte that regulates blood pressure, nerve transmission, and muscle contraction — works in balance with sodium.
Potassium is the primary intracellular cation and one of the most important electrolytes in the body. It's essential for maintaining proper fluid balance, nerve transmission, muscle contraction, and blood pressure regulation. Most people don't get enough potassium from diet alone. Higher potassium intake is strongly associated with lower blood pressure and reduced stroke risk. Works in balance with sodium.
Promotes sodium excretion and vasodilation
Essential for muscle contraction
Required for nerve impulse transmission
How Potassium works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
99-500mg daily from supplements (food provides more)
Loading: Not required; get most from food
Take with food
| Form | Type |
|---|---|
| 💊Potassium Citrate or Potassium Gluconate | Recommended |
| 💊Potassium Chloride | Alternative |
| 💊Potassium Bicarbonate | Alternative |
Citrate is well-tolerated and may benefit bone health. Chloride is used for deficiency. Most supplements are limited to 99mg.
Minimum: 4 weeks
Optimal: 12 weeks
Cycling: Not required
Note: Supplements are limited to 99mg per pill by FDA. Most potassium should come from food (bananas, potatoes, leafy greens).
Significant reduction in blood pressure
Fewer muscle cramps and better function
Reduced risk of stroke
Too much can be dangerous
AVOID supplementation; potassium can accumulate to dangerous levels
May need more due to sweat losses; replenish during exercise
Can increase potassium levels; monitor closely
Risk of dangerous hyperkalemia; avoid combination — may affect electrolyte balance or enhance fluid loss — may affect electrolyte balance or enhance fluid loss
May increase potassium retention
Risk of dangerous hyperkalemia
Risk of dangerous hyperkalemia
DANGEROUS hyperkalemia, cardiac arrhythmias
Risk of dangerous hyperkalemia, cardiac arrhythmias
Life-threatening hyperkalemia risk
Dangerous hyperkalemia, cardiac arrest risk
Life-threatening hyperkalemia
Complex interaction - both deficiency and excess dangerous
Counteracts therapeutic effect of potassium removal
Tip: Take with food; use slow-release forms
Tip: Monitor if on medications that raise potassium; avoid with kidney disease
Top studies from 40+ peer-reviewed papers
Pillinger T et al. • Lancet (London, England) (2025)
“We found strong evidence that antidepressants differ markedly in their physiological effects, particularly for cardiometabolic parameters.”
Rossignol P et al. • Lancet (London, England) (2025)
“In patients with kidney failure on haemodialysis and with high risk of adverse cardiovascular outcomes, spironolactone did not reduce the incidence of major cardiovascular events.”
Natale P et al. • The Cochrane database of systematic reviews (2020)
“Evidence supporting clinical decision-making for different potassium binders to treat chronic hyperkalaemia in adults with CKD is of low certainty; no studies were identified in children.”
Jøns C et al. • The New England journal of medicine (2025)
“Among participants with any cardiovascular disease who had an ICD and were at high risk for ventricular arrhythmias, a treatment-induced increase in plasma potassium levels led to a significantly lower risk of appropriate ICD therapy, unplanned hospitalization for arrhythmia or heart failure, or death from any cause than standard care. (Funded by the Independent Research Fund Denmark and others; POTCAST ClinicalTrials.gov number, NCT03833089.).”
Vardeny O et al. • JAMA cardiology (2025)
“In patients with heart failure with mildly reduced or preserved ejection fraction, finerenone resulted in more frequent hyperkalemia and less frequent hypokalemia.”
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