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Potassium for High Blood Pressure (Hypertension)

B

WHO conditional recommendation. Meta-analysis: systolic -3.49 mmHg. DASH diet (4,700 mg K/day) reduces systolic BP by 8-14 mmHg. Potassium-enriched salt substitutes reduced stroke risk by 14% in a 2022 Lancet study.

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The Bottom Line

            
            
WHO conditional recommendation. Meta-analysis: systolic -3.49 mmHg. DASH diet (4,700 mg K/day) reduces systolic BP by 8-14 mmHg. Potassium-enriched salt substitutes reduced stroke risk by 14% in a 2022 Lancet study.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
22

        
Studies

    

    

        
1600

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        B

        
Grade

    




        


        
        

        
        
        

            

  
Dosage & Usage





            
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units


            
            

                
Commonly Used Dosages

                

                    
                    

                        
supplements:

                        
Typically 99 mg/dose (FDA limit per unit)

                    

                    
                    

                        
dashdiettarget:

                        
4,700 mg/day

                    

                    
                    

                        
whorecommendation:

                        
3,510 mg/day from food

                    

                    
                

                
                

                    Upper limit: No UL for dietary potassium in healthy individuals; supplemental potassium should be supervised
                

                
            

            

            

            
            

                Best taken: With meals to reduce GI irritation; divide supplemental doses throughout the day
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Reported Side Effects

                    
    
                        
                        
  • 
                            ⚠
                            Gastrointestinal irritation (nausea, vomiting, diarrhea)
                        
    • 
                        
                        
  • 
                            ⚠
                            Hyperkalemia risk in patients with renal impairment
                        
    • 
                        
                        
  • 
                            ⚠
                            Cardiac arrhythmias at excessively high serum levels
                        
    • 
                        
                    

                

                

                
                

                    
Known Interactions

                    
    
                        
                        
  • 
                            ●
                            ACE inhibitors (increased hyperkalemia risk)
                        
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                            ●
                            ARBs (increased hyperkalemia risk)
                        
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  • 
                            ●
                            Potassium-sparing diuretics (increased hyperkalemia risk)
                        
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                            ●
                            NSAIDs (may increase potassium retention)
                        
    • 
                        
                    

                

                

                
                

                    

                        Tolerable upper intake: No UL for dietary potassium in healthy individuals; supplemental potassium should be supervised
                    

                

                
            

            

                Always consult your healthcare provider before starting any supplement.
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does Potassium help with High Blood Pressure (Hypertension)?
            
        
        

            Based on 22 studies with 1,600 participants, there is moderate evidence from clinical studies that Potassium may support High Blood Pressure (Hypertension) management. Our evidence grade is B (Good Evidence).
        

    

    
    

        
            How much Potassium should I take for High Blood Pressure (Hypertension)?
            
        
        

            Studies have used various dosages. A commonly studied range is Typically 99 mg/dose (FDA limit per unit). Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Potassium?
            
        
        

            Reported side effects may include Gastrointestinal irritation (nausea, vomiting, diarrhea), Hyperkalemia risk in patients with renal impairment, Cardiac arrhythmias at excessively high serum levels. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

        
            How strong is the evidence for Potassium and High Blood Pressure (Hypertension)?
            
        
        

            We rate the evidence as Grade B (Good Evidence). This rating is based on 22 peer-reviewed studies with 1,600 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                
                

                
                

                    
Potassium for other conditions

                    

                        
                        
                            Cardiac Arrhythmia
                            C

                        
                        
                    

                

                
            

        

        

    


    
    












    

        FDA Disclaimer:
        These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.