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Green Tea Extract (EGCG) لـ 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

        

        

            
الخلاصة

            
            
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

        
الدراسات

    

    

        
1500

        
المشاركون

    

    

        
            
            ↑
            
        
        
Positive

    

    

        B

        
التقييم

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
الجرعات الشائعة

                

                    
                    

                        
general:

                        
250-500 mg/day standardized to 50% EGCG

                    

                    
                    

                        
equivalent:

                        
3-5 cups green tea/day

                    

                    
                    

                        
weightmanagement:

                        
400-800 mg EGCG/day

                    

                    
                

                
                

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

                
            

            

            

            
            

                أفضل وقت للتناول: With meals (reduces nausea risk); avoid on empty stomach; space from iron-containing foods/supp
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
الآثار الجانبية المُبلّغ عنها

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

                

                

                
                

                    
التفاعلات المعروفة

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

                

                

                
                

                    

                        الحد الأقصى المسموح به: 800 mg EGCG/day (hepatotoxicity risk above this; rare but documented)
                    

                

                
            

            

                استشر مقدم الرعاية الصحية دائماً قبل البدء بأي مكمل غذائي.
            

        

        

        
        
        

            

  
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





            

                
                
                

                
                
                
            

        

        

    


    
    












    

        إخلاء مسؤولية FDA:
        لم تُقيَّم هذه البيانات من قبل إدارة الغذاء والدواء (FDA). لا تهدف المنتجات والمعلومات الواردة في هذا الموقع إلى تشخيص أو علاج أو شفاء أو الوقاية من أي مرض. تستند تقييمات الأدلة المعروضة إلى تحليلنا للأبحاث المحكّمة المنشورة ولا تُشكّل نصيحة طبية. استشر مقدم الرعاية الصحية دائماً قبل البدء بأي نظام مكملات.