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Quercetin for Atherosclerosis

D Early Research Only preliminary research exists (lab studies, case reports).

In vitro evidence for PCSK9 inhibition and reduced foam cell formation. Limited human data on atherosclerosis endpoints specifically.

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            D

        

        

            
The Bottom Line

            
            
In vitro evidence for PCSK9 inhibition and reduced foam cell formation. Limited human data on atherosclerosis endpoints specifically.

            
            
        

    










    

  
Key Study Findings





    

        
        

            

                
                    Other
                
                
                
                
            

            
                Exploration of Potential Targets and Molecular Mechanisms of the Yiqi Jianpi Tongqiao Formula in Treating …
            
            

                
                Dose: None
                
                
                vs: Allergic rhinitis mouse model vs control
                
                
                Outcome: Rhinitis symptoms and serum inflammatory indicators
                
                
                Effect: None
                
                
                None
                
            

            
            
Population: Allergic rhinitis mouse model

            
        

        
        

            

                
                    Other
                
                
                
                
            

            
                Dual Modulation of Canonical and Non-canonical TGF-β/ROS/Erk1/2 Pathways: Synergistic Activation of Nrf-2 and Antioxidant Enzymes …
            
            

                
                Dose: None
                
                
                vs: None
                
                
                Outcome: Inflammatory markers
                
                
                Effect: None
                
                
                None
                
            

            
            
Population: None

            
        

        
        

            

                
                    Review
                
                
                
                
            

            
                Using herbal medicine to target the "microbiota-metabolism-immunity" axis as possible therapy for cardiovascular disease.
            
            

                
                Dose: None
                
                
                vs: None
                
                
                Outcome: Gut microbiota composition
                
                
                Effect: None
                
                
                None
                
            

            
            
Population: None

            
        

        
        

            

                
                    In Vitro
                
                
                
                
            

            
                Dietary Polyphenols in the Prevention of Stroke.
            
            

                
                Dose: None
                
                
                vs: None
                
                
                Outcome: Stroke prevention
                
                
                Effect: None
                
                
                None
                
            

            
            
Population: General population (CVD risk)

            
        

        
    







    
    

        
        

            

  
Key Statistics





            


    

        
2

        
Studies

    

    

        
100

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        D

        
Grade

    




        


        
        
        

            

  
Referenced Papers





            

                
                

                    

                        
                            Exploration of Potential Targets and Molecular Mechanisms of the Yiqi Jianpi Tongqiao Formula in Treating Allergic Rhinitis Mouse Model based …
                        
                        
                            
                                Other
                            
                            
                            
                        
                    

                    

                        Current computer-aided drug …
                        2025
                        
                        2 citations
                        
                    

                

                
                

                    

                        
                            Dual Modulation of Canonical and Non-canonical TGF-β/ROS/Erk1/2 Pathways: Synergistic Activation of Nrf-2 and Antioxidant Enzymes (SOD1, GPx, HO-1) by Quercetin …
                        
                        
                            
                                Other
                            
                            
                            
                        
                    

                    

                        Iranian journal of …
                        2024
                        
                        4 citations
                        
                    

                

                
                

                    

                        
                            Using herbal medicine to target the "microbiota-metabolism-immunity" axis as possible therapy for cardiovascular disease.
                        
                        
                            
                                Review
                            
                            
                            
                        
                    

                    

                        Pharmacological research
                        2019
                        
                        31 citations
                        
                    

                

                
                

                    

                        
                            Dietary Polyphenols in the Prevention of Stroke.
                        
                        
                            
                                Review
                            
                            
                            
                        
                    

                    

                        Oxidative medicine and …
                        2017
                        
                        87 citations
                        
                    

                

                
            

        

        

        
        
        

            

  
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
                

                
            

            

            
            

                
Dosages Studied in Research

                

                    

                        
                            

                                Dosage
                                Duration
                                Effect
                                N
                            

                        
                        
                            
                            

                                None
                                --
                                
                                    
                                    Positive
                                    
                                
                                --
                            

                            
                            

                                None
                                --
                                
                                    
                                    Positive
                                    
                                
                                --
                            

                            
                            

                                None
                                --
                                
                                    
                                    Mixed
                                    
                                
                                --
                            

                            
                            

                                None
                                --
                                
                                    
                                    Positive
                                    
                                
                                --
                            

                            
                        
                    

                

            

            

            
            

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

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Reported Side Effects

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

                

                

                
                

                    
Known Interactions

                    
    
                        
                        
  • 
                            ●
                            Antibiotics (quinolones — may reduce efficacy)
                        
    • 
                        
                        
  • 
                            ●
                            Cyclosporine (may increase blood levels)
                        
    • 
                        
                        
  • 
                            ●
                            Anticoagulants (may have mild antiplatelet effect)
                        
    • 
                        
                        
  • 
                            ●
                            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 Atherosclerosis?
            
        
        

            Based on 2 studies with 100 participants, there is preliminary evidence that needs more research that Quercetin may support Atherosclerosis management. Our evidence grade is D (Very Early Research).
        

    

    
    

        
            How much Quercetin should I take for Atherosclerosis?
            
        
        

            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 Atherosclerosis?
            
        
        

            We rate the evidence as Grade D (Very Early Research). This rating is based on 2 peer-reviewed studies with 100 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  




            

                
                
                

                
                

                    
Quercetin for other conditions

                    

                        
                        
                            High Blood Pressure (Hypertension)
                            B

                        
                        
                    

                

                
            

        

        

    


    
    






  
References

  
    
    
    
  1. 
      [1]
      Sihong Huang et al..
      Curr Comput Aided Drug Des.
      2025.
      Exploration of Potential Targets and Molecular Mechanisms of the Yiqi Jianpi Tongqiao Formula in Treating Allergic Rhinitis Mouse Model based …
      doi:10.2174/0115734099299714240516160158
      PubMed
    
    2. 
    
    
  2. 
      [2]
      Masoumeh Shamsi et al..
      Iran J Pharm Res.
      2024.
      Dual Modulation of Canonical and Non-canonical TGF-β/ROS/Erk1/2 Pathways: Synergistic Activation of Nrf-2 and Antioxidant Enzymes (SOD1, GPx, HO-1) by Quercetin …
      doi:10.5812/ijpr-151428
      PubMed
    
    3. 
    
    
  3. 
      [3]
      Wang Anlu et al..
      Pharmacol Res.
      2019.
      Using herbal medicine to target the "microbiota-metabolism-immunity" axis as possible therapy for cardiovascular disease.
      doi:10.1016/j.phrs.2019.02.018
      PubMed
    
    4. 
    
    
  4. 
      [4]
      A Tressera-Rimbau et al..
      Oxid Med Cell Longev.
      2017.
      Dietary Polyphenols in the Prevention of Stroke.
      doi:10.1155/2017/7467962
      PubMed
    
    5. 
    
  















    

        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.