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Green Tea Extract pour UV Protection (Internal Photoprotection)

B

Research suggests oral green tea polyphenols (250-1,080 mg/day) increased MED by approximately 25%, providing internal photoprotection through antioxidant and anti-inflammatory mechanisms.

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            B

        

        

            
En conclusion

            
            
Research suggests oral green tea polyphenols (250-1,080 mg/day) increased MED by approximately 25%, providing internal photoprotection through antioxidant and anti-inflammatory mechanisms.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
8

        
Études

    

    

        
450

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        B

        
Note

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
Posologies couramment utilisées

                

                    
                    

                        
general:

                        
250-500 mg/day green tea extract

                    

                    
                    

                        
skinhealth:

                        
250-500 mg/day standardized to 50-90% EGCG

                    

                    
                

                
                

                    Limite supérieure : 800 mg EGCG/day (doses above may cause hepatotoxicity in rare cases)
                

                
            

            

            

            
            

                Moment optimal de prise : With meals (may cause nausea on empty stomach); avoid with iron-rich foods
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Effets indésirables signalés

                    
    
                        
                        
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                            ⚠
                            Nausea (especially on empty stomach)
                        
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                            ⚠
                            Insomnia and jitteriness (caffeine content)
                        
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                            ⚠
                            Rare hepatotoxicity at high doses (> 800 mg EGCG/day)
                        
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                            ⚠
                            Reduced iron absorption
                        
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Interactions connues

                    
    
                        
                        
  • 
                            ●
                            Iron supplements (reduces absorption — separate by 2+ hours)
                        
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                            ●
                            Stimulant medications (additive caffeine effects)
                        
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  • 
                            ●
                            Blood thinners (may have mild antiplatelet effects)
                        
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  • 
                            ●
                            Hepatotoxic medications (potential additive liver stress at high doses)
                        
    • 
                        
                    

                

                

                
                

                    

                        Apport maximal tolérable : 800 mg EGCG/day (doses above may cause hepatotoxicity in rare cases)
                    

                

                
            

            

                Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does Green Tea Extract help with UV Protection (Internal Photoprotection)?
            
        
        

            Based on 8 studies with 450 participants, there is moderate evidence from clinical studies that Green Tea Extract may support UV Protection (Internal Photoprotection) management. Our evidence grade is B (Good Evidence).
        

    

    
    

        
            How much Green Tea Extract should I take for UV Protection (Internal Photoprotection)?
            
        
        

            Studies have used various dosages. A commonly studied range is 250-500 mg/day green tea extract. Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Green Tea Extract?
            
        
        

            Reported side effects may include Nausea (especially on empty stomach), Insomnia and jitteriness (caffeine content), Rare hepatotoxicity at high doses (> 800 mg EGCG/day), Reduced iron absorption. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

        
            How strong is the evidence for Green Tea Extract and UV Protection (Internal Photoprotection)?
            
        
        

            We rate the evidence as Grade B (Good Evidence). This rating is based on 8 peer-reviewed studies with 450 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                
                

                
                

                    
Green Tea Extract pour d'autres pathologies

                    

                        
                        
                            Acne
                            D

                        
                        
                    

                

                
            

        

        

    


    
    












    

        Avertissement FDA:
        Ces déclarations n'ont pas été évaluées par la Food and Drug Administration. Les produits et informations sur ce site ne sont pas destinés à diagnostiquer, traiter, guérir ou prévenir quelque maladie que ce soit. Les notes de preuve présentées sont basées sur notre analyse de la recherche publiée et évaluée par des pairs et ne constituent pas un avis médical. Consultez toujours votre professionnel de santé avant de commencer tout régime de compléments alimentaires.