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Quercetin for High Blood Pressure (Hypertension)

B

Meta-analysis of 17 RCTs: systolic -3.09 mmHg at >=500 mg/day. More effective in >=8-week studies and hypertensive subjects. Phytosome form preferred for bioavailability.

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            B

        

        

            
The Bottom Line

            
            
Meta-analysis of 17 RCTs: systolic -3.09 mmHg at >=500 mg/day. More effective in >=8-week studies and hypertensive subjects. Phytosome form preferred for bioavailability.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
17

        
Studies

    

    

        
900

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        B

        
Grade

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
Commonly Used Dosages

                

                    
                    

                        
general:

                        
500-1,000 mg/day

                    

                    
                    

                        
bloodpressuresupport:

                        
500-730 mg/day

                    

                    
                

                
                

                    Upper limit: Not formally established; up to 1,000 mg/day used in clinical trials
                

                
            

            

            

            
            

                Best taken: With meals; vitamin C co-supplementation may enhance bioavailability
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Reported Side Effects

                    
    
                        
                        
  • 
                            ⚠
                            Generally well-tolerated
                        
    • 
                        
                        
  • 
                            ⚠
                            Headache (rare)
                        
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  • 
                            ⚠
                            Mild gastrointestinal discomfort
                        
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  • 
                            ⚠
                            Tingling in extremities (rare, high doses)
                        
    • 
                        
                    

                

                

                
                

                    
Known Interactions

                    
    
                        
                        
  • 
                            ●
                            Antibiotics (quinolones — may reduce efficacy)
                        
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                            ●
                            Cyclosporine (may increase blood levels)
                        
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  • 
                            ●
                            Anticoagulants (may have mild antiplatelet effect)
                        
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                            ●
                            Blood pressure medications (additive effect)
                        
    • 
                        
                    

                

                

                
                

                    

                        Tolerable upper intake: Not formally established; up to 1,000 mg/day used in clinical trials
                    

                

                
            

            

                Always consult your healthcare provider before starting any supplement.
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does Quercetin help with High Blood Pressure (Hypertension)?
            
        
        

            Based on 17 studies with 900 participants, there is moderate evidence from clinical studies that Quercetin may support High Blood Pressure (Hypertension) management. Our evidence grade is B (Good Evidence).
        

    

    
    

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

            Studies have used various dosages. A commonly studied range is 500-1,000 mg/day. Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Quercetin?
            
        
        

            Reported side effects may include Generally well-tolerated, Headache (rare), Mild gastrointestinal discomfort, Tingling in extremities (rare, high doses). Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

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

            We rate the evidence as Grade B (Good Evidence). This rating is based on 17 peer-reviewed studies with 900 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                
                

                
                

                    
Quercetin for other conditions

                    

                        
                        
                            Atherosclerosis
                            D

                        
                        
                    

                

                
            

        

        

    


    
    












    

        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.