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Green Tea Extract (EGCG) pour Obesity

B

Cochrane review of 14 RCTs found EGCG plus caffeine produces modest but statistically significant weight loss of 1.0-1.3 kg over 12 weeks. Twenty-four-hour energy expenditure increased approximately 5% and fat oxidation approximately 16%, with effects more pronounced in Asian populations and habitual low-caffeine consumers.

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            B

        

        

            
En conclusion

            
            
Cochrane review of 14 RCTs found EGCG plus caffeine produces modest but statistically significant weight loss of 1.0-1.3 kg over 12 weeks. Twenty-four-hour energy expenditure increased approximately 5% and fat oxidation approximately 16%, with effects more pronounced in Asian populations and habitual low-caffeine consumers.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
14

        
Études

    

    

        
1500

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        B

        
Note

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
Posologies couramment utilisées

                

                    
                    

                        
general:

                        
250-500 mg/day standardized to 50% EGCG

                    

                    
                    

                        
equivalent:

                        
3-5 cups green tea/day

                    

                    
                    

                        
weightmanagement:

                        
400-800 mg EGCG/day

                    

                    
                

                
                

                    Limite supérieure : 800 mg EGCG/day (hepatotoxicity risk above this; rare but documented)
                

                
            

            

            

            
            

                Moment optimal de prise : With meals (reduces nausea risk); avoid on empty stomach; space from iron-containing foods/supp
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Effets indésirables signalés

                    
    
                        
                        
  • 
                            ⚠
                            Nausea on empty stomach
                        
    • 
                        
                        
  • 
                            ⚠
                            Insomnia (caffeine content)
                        
    • 
                        
                        
  • 
                            ⚠
                            Rare hepatotoxicity at high doses
                        
    • 
                        
                        
  • 
                            ⚠
                            Reduced iron absorption
                        
    • 
                        
                    

                

                

                
                

                    
Interactions connues

                    
    
                        
                        
  • 
                            ●
                            Nadolol (reduced bioavailability)
                        
    • 
                        
                        
  • 
                            ●
                            Iron supplements (reduced absorption)
                        
    • 
                        
                        
  • 
                            ●
                            Blood thinners (theoretical)
                        
    • 
                        
                        
  • 
                            ●
                            Other stimulants (additive effects)
                        
    • 
                        
                    

                

                

                
                

                    

                        Apport maximal tolérable : 800 mg EGCG/day (hepatotoxicity risk above this; rare but documented)
                    

                

                
            

            

                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 (EGCG) help with Obesity?
            
        
        

            Based on 14 studies with 1,500 participants, there is moderate evidence from clinical studies that Green Tea Extract (EGCG) may support Obesity management. Our evidence grade is B (Good Evidence).
        

    

    
    

        
            How much Green Tea Extract (EGCG) should I take for Obesity?
            
        
        

            Studies have used various dosages. A commonly studied range is 250-500 mg/day standardized to 50% EGCG. Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Green Tea Extract (EGCG)?
            
        
        

            Reported side effects may include Nausea on empty stomach, Insomnia (caffeine content), Rare hepatotoxicity at high doses, 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 (EGCG) and Obesity?
            
        
        

            We rate the evidence as Grade B (Good Evidence). This rating is based on 14 peer-reviewed studies with 1,500 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                
                

                
                
                
            

        

        

    


    
    












    

        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.