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Flaxseed Oil for High Blood Pressure (Hypertension)

B

Meta-analysis of 11 RCTs: systolic -2.85 mmHg. FLAX-PAD: -10 mmHg systolic in hypertensive PAD patients. Greater benefit with >12 weeks supplementation.

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The Bottom Line

            
            
Meta-analysis of 11 RCTs: systolic -2.85 mmHg. FLAX-PAD: -10 mmHg systolic in hypertensive PAD patients. Greater benefit with >12 weeks supplementation.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
11

        
Studies

    

    

        
700

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        B

        
Grade

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
Commonly Used Dosages

                

                    
                    

                        
general:

                        
1-2 tablespoons oil/day (7-14g ALA)

                    

                    
                    

                        
capsules:

                        
1,000-2,000 mg/day

                    

                    
                

                
                

                    Upper limit: Not formally established; up to 40g/day ground flaxseed used in clinical trials
                

                
            

            

            

            
            

                Best taken: With meals; refrigerate oil to prevent oxidation
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Reported Side Effects

                    
    
                        
                        
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                            ⚠
                            Mild gastrointestinal discomfort (bloating, gas)
                        
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                            ⚠
                            Diarrhea at high doses
                        
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                            ⚠
                            Potential interaction with blood-thinning medications
                        
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Known Interactions

                    
    
                        
                        
  • 
                            ●
                            Anticoagulants (mild additive antiplatelet effect)
                        
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                            ●
                            Blood pressure medications (additive hypotensive effect)
                        
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                            ●
                            May reduce absorption of oral medications if taken concurrently (fiber content)
                        
    • 
                        
                    

                

                

                
                

                    

                        Tolerable upper intake: Not formally established; up to 40g/day ground flaxseed used in clinical trials
                    

                

                
            

            

                Always consult your healthcare provider before starting any supplement.
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does Flaxseed Oil help with High Blood Pressure (Hypertension)?
            
        
        

            Based on 11 studies with 700 participants, there is moderate evidence from clinical studies that Flaxseed Oil may support High Blood Pressure (Hypertension) management. Our evidence grade is B (Good Evidence).
        

    

    
    

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

            Studies have used various dosages. A commonly studied range is 1-2 tablespoons oil/day (7-14g ALA). Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Flaxseed Oil?
            
        
        

            Reported side effects may include Mild gastrointestinal discomfort (bloating, gas), Diarrhea at high doses, Potential interaction with blood-thinning medications. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

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

            We rate the evidence as Grade B (Good Evidence). This rating is based on 11 peer-reviewed studies with 700 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                
                

                
                

                    
Flaxseed Oil 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.