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Potassium supplements
supplement Under reviewPotassium supplements provide elemental potassium, an essential mineral and electrolyte that plays a central role in maintaining fluid balance, transmitting nerve impulses, and enabling normal muscle contraction, including the function of the heart muscle. In supplements, potassium is typically supplied as potassium chloride, gluconate, citrate, bicarbonate, or other salts, which dissociate in the gut to release potassium ions that enter the bloodstream. By supporting the body’s electrical gradients across cell membranes, potassium helps regulate blood pressure, contributes to normal heart rhythm, and assists in maintaining acid–base balance. In healthy people, most potassium comes from food, but supplements can be used to correct low intake or increased losses from sweat, certain diets, or medications. Over-the-counter products in the United States generally provide relatively small doses per serving, while higher-dose preparations are used medically under supervision.
Research summary
Human research on potassium intake, including supplementation, shows the clearest benefits for blood pressure reduction, especially in adults with elevated blood pressure and higher sodium intake. Meta-analyses and controlled trials indicate that increasing potassium intake through supplements can modestly lower systolic and diastolic blood pressure, with stronger effects in people with hypertension than in normotensive individuals. Experimental human data also support a role for potassium in improving overall electrolyte balance and mitigating sodium-related fluid retention. Evidence for broader cardiovascular outcomes such as reduced heart disease or stroke risk is stronger for higher potassium intake from overall diet than for supplements specifically. Observational studies link higher potassium intake with lower risk of stroke and possibly cardiovascular events, but it remains unclear how much of this effect is attributable to supplements versus dietary patterns. In generally healthy adults with normal kidney function, moderate-dose potassium supplementation appears well tolerated, with gastrointestinal discomfort being the most commonly reported side effect at higher doses. The main safety concern is the potential for high blood potassium levels when supplements are used in people with impaired kidney function or in combination with certain medications.
Reported Benefits
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Tolerance and Safety of Sustained-Release Potassium Chloride in Healthy Volunteers
Whelton PK, Bryner J, Chesney CM, Klag MJ
Effect of Oral Potassium Supplements on Blood Pressure in Normotensive and Hypertensive Adults
Svetkey LP, Sacks FM, Obarzanek E, Vollmer WM, Appel LJ, Lin PH, Karanja N, Harsha D
Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses.
Aburto NJ, Hanson S, Gutierrez H, Hooper L, Elliott P, Cappuccio FP
Potassium Intake and Blood Pressure: A Dose–Response Meta-analysis of Randomized Controlled Trials
Filippini T, Violi F, D'Amico R, Vinceti M
No reports yet
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The Effect of Potassium Supplementation on Exercise Blood Pressure and Vascular Responses in Healthy Adults
Berry SE, Tucker L, Banfield LM
Effect of Oral Potassium Supplements on Blood Pressure in Normotensive and Hypertensive Adults
Svetkey LP, Sacks FM, Obarzanek E, Vollmer WM, Appel LJ, Lin PH, Karanja N, Harsha D
Potassium Intake and Blood Pressure: A Dose–Response Meta-analysis of Randomized Controlled Trials
Filippini T, Violi F, D'Amico R, Vinceti M
Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses.
Aburto NJ, Hanson S, Gutierrez H, Hooper L, Elliott P, Cappuccio FP
No reports yet
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Add Potassium supplements to your stack to report effects
The Effect of Potassium Supplementation on Exercise Blood Pressure and Vascular Responses in Healthy Adults
Berry SE, Tucker L, Banfield LM
Effect of Oral Potassium Supplements on Blood Pressure in Normotensive and Hypertensive Adults
Svetkey LP, Sacks FM, Obarzanek E, Vollmer WM, Appel LJ, Lin PH, Karanja N, Harsha D
Potassium Intake and Blood Pressure: A Dose–Response Meta-analysis of Randomized Controlled Trials
Filippini T, Violi F, D'Amico R, Vinceti M
Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses.
Aburto NJ, Hanson S, Gutierrez H, Hooper L, Elliott P, Cappuccio FP
No reports yet
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Effects of Potassium Bicarbonate Supplementation on Calcium and Mineral Metabolism in Healthy Postmenopausal Women
Sebastian A, Harris ST, Ottaway JH, Todd KM, Morris RC Jr
No reports yet
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Potassium Citrate Supplementation and Risk of Nephrolithiasis in Adults with a History of Kidney Stones
Barcelo P, Wuhl O, Servitge E, Rousaud A, Pak CY
Reported Side Effects
No reports yet
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Add Potassium supplements to your stack to report effects
Tolerance and Safety of Sustained-Release Potassium Chloride in Healthy Volunteers
Whelton PK, Bryner J, Chesney CM, Klag MJ
No reports yet
Be the first to report this effect and help the community.
Add Potassium supplements to your stack to report effects
Tolerance and Safety of Sustained-Release Potassium Chloride in Healthy Volunteers
Whelton PK, Bryner J, Chesney CM, Klag MJ
Related health conditions
Research showing how this habit affects specific health conditions. Always consult healthcare professionals.
May Help With
Low bone density increasing fracture risk
Effects of Potassium Bicarbonate Supplementation on Calcium and Mineral Metabolism in Healthy Postmenopausal Women
Sebastian A, Harris ST, Ottaway JH, Todd KM, Morris RC Jr
Coronary artery disease or other cardiac conditions
Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses.
Aburto NJ, Hanson S, Gutierrez H, Hooper L, Elliott P, Cappuccio FP
Hypertension — elevated blood pressure requiring management
Potassium Intake and Blood Pressure: A Dose–Response Meta-analysis of Randomized Controlled Trials
Filippini T, Violi F, D'Amico R, Vinceti M
Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses.
Aburto NJ, Hanson S, Gutierrez H, Hooper L, Elliott P, Cappuccio FP
Effect of Oral Potassium Supplements on Blood Pressure in Normotensive and Hypertensive Adults
Svetkey LP, Sacks FM, Obarzanek E, Vollmer WM, Appel LJ, Lin PH, Karanja N, Harsha D
The Effect of Potassium Supplementation on Exercise Blood Pressure and Vascular Responses in Healthy Adults
Berry SE, Tucker L, Banfield LM
Research (7 studies)
Potassium Intake and Blood Pressure: A Dose–Response Meta-analysis of Randomized Controlled Trials
Filippini T, Violi F, D'Amico R, Vinceti M
Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses.
Aburto NJ, Hanson S, Gutierrez H, Hooper L, Elliott P, Cappuccio FP
The Effect of Potassium Supplementation on Exercise Blood Pressure and Vascular Responses in Healthy Adults
Berry SE, Tucker L, Banfield LM
Effect of Oral Potassium Supplements on Blood Pressure in Normotensive and Hypertensive Adults
Svetkey LP, Sacks FM, Obarzanek E, Vollmer WM, Appel LJ, Lin PH, Karanja N, Harsha D
Effects of Potassium Bicarbonate Supplementation on Calcium and Mineral Metabolism in Healthy Postmenopausal Women
Sebastian A, Harris ST, Ottaway JH, Todd KM, Morris RC Jr
Potassium Citrate Supplementation and Risk of Nephrolithiasis in Adults with a History of Kidney Stones
Barcelo P, Wuhl O, Servitge E, Rousaud A, Pak CY
Tolerance and Safety of Sustained-Release Potassium Chloride in Healthy Volunteers
Whelton PK, Bryner J, Chesney CM, Klag MJ
Community updates
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