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Selenium for Oxidative Stress (Cardiovascular)

B

KiSel-10 trial: 54% CV mortality reduction with combination selenium (200 mcg) + CoQ10 (200 mg) over 4 years. 12-year follow-up confirmed sustained benefit. Most relevant in selenium-deficient populations.

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            B

        

        

            
The Bottom Line

            
            
KiSel-10 trial: 54% CV mortality reduction with combination selenium (200 mcg) + CoQ10 (200 mg) over 4 years. 12-year follow-up confirmed sustained benefit. Most relevant in selenium-deficient populations.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
3

        
Studies

    

    

        
600

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        B

        
Grade

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
Commonly Used Dosages

                

                    
                    

                        
general:

                        
55 mcg/day

                    

                    
                    

                        
cardiovascularantioxidant:

                        
100-200 mcg/day

                    

                    
                

                
                

                    Upper limit: 400 mcg/day (risk of selenosis above this level)
                

                
            

            

            

            
            

                Best taken: With meals
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Reported Side Effects

                    
    
                        
                        
  • 
                            ⚠
                            Selenosis at high doses (garlic breath odor, hair/nail loss, nausea)
                        
    • 
                        
                        
  • 
                            ⚠
                            GI discomfort at moderate-high doses
                        
    • 
                        
                        
  • 
                            ⚠
                            Potential increased type 2 diabetes risk at high supplemental doses
                        
    • 
                        
                    

                

                

                
                

                    
Known Interactions

                    
    
                        
                        
  • 
                            ●
                            Cisplatin and other chemotherapy drugs (may affect efficacy)
                        
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                            ●
                            Statins (may enhance antioxidant effects)
                        
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  • 
                            ●
                            CoQ10 (synergistic cardiovascular benefit — KiSel-10 combination)
                        
    • 
                        
                    

                

                

                
                

                    

                        Tolerable upper intake: 400 mcg/day (risk of selenosis above this level)
                    

                

                
            

            

                Always consult your healthcare provider before starting any supplement.
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does Selenium help with Oxidative Stress (Cardiovascular)?
            
        
        

            Based on 3 studies with 600 participants, there is moderate evidence from clinical studies that Selenium may support Oxidative Stress (Cardiovascular) management. Our evidence grade is B (Good Evidence).
        

    

    
    

        
            How much Selenium should I take for Oxidative Stress (Cardiovascular)?
            
        
        

            Studies have used various dosages. A commonly studied range is 55 mcg/day. Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Selenium?
            
        
        

            Reported side effects may include Selenosis at high doses (garlic breath odor, hair/nail loss, nausea), GI discomfort at moderate-high doses, Potential increased type 2 diabetes risk at high supplemental doses. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

        
            How strong is the evidence for Selenium and Oxidative Stress (Cardiovascular)?
            
        
        

            We rate the evidence as Grade B (Good Evidence). This rating is based on 3 peer-reviewed studies with 600 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                

                    
Other ingredients for Oxidative Stress (Cardiovascular)

                    

                        
                        
                            PQQ (Pyrroloquinoline Quinone)
                            C

                        
                        
                    

                

                

                
                

                    
Selenium for other conditions

                    

                        
                        
                            Coronary Artery Disease (CAD)
                            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.