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WeightCited

Green Coffee Bean Extract for Overweight Management

D

Meta-analysis of 5 RCTs (n=142) found 2.47 kg weight loss, but all studies were of poor methodological quality. A retracted 2012 study inflated initial enthusiasm. Post-retraction reviews suggest modest effects, but high-quality evidence remains lacking.

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The Bottom Line

            
            
Meta-analysis of 5 RCTs (n=142) found 2.47 kg weight loss, but all studies were of poor methodological quality. A retracted 2012 study inflated initial enthusiasm. Post-retraction reviews suggest modest effects, but high-quality evidence remains lacking.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
5

        
Studies

    

    

        
142

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        D

        
Grade

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
Commonly Used Dosages

                

                    
                    

                        
general:

                        
200-400 mg/day standardized to 45-50% chlorogenic acid

                    

                    
                    

                        
weightmanagement:

                        
400-800 mg CGA/day

                    

                    
                

                
                

                    Upper limit: No established UL; caffeine content varies (typically 10-30 mg per capsule)
                

                
            

            

            

            
            

                Best taken: 30 minutes before meals
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Reported Side Effects

                    
    
                        
                        
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                            ⚠
                            Insomnia (caffeine content)
                        
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                            Anxiety
                        
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                            Headache
                        
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                            GI discomfort
                        
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Known Interactions

                    
    
                        
                        
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                            ●
                            Diabetes medications (may lower blood sugar)
                        
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                            ●
                            Other caffeine sources (additive effects)
                        
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                            Blood pressure medications
                        
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                        Tolerable upper intake: No established UL; caffeine content varies (typically 10-30 mg per capsule)
                    

                

                
            

            

                Always consult your healthcare provider before starting any supplement.
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does Green Coffee Bean Extract help with Overweight Management?
            
        
        

            Based on 5 studies with 142 participants, there is preliminary evidence that needs more research that Green Coffee Bean Extract may support Overweight Management management. Our evidence grade is D (Very Early Research).
        

    

    
    

        
            How much Green Coffee Bean Extract should I take for Overweight Management?
            
        
        

            Studies have used various dosages. A commonly studied range is 200-400 mg/day standardized to 45-50% chlorogenic acid. Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Green Coffee Bean Extract?
            
        
        

            Reported side effects may include Insomnia (caffeine content), Anxiety, Headache, GI discomfort. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

        
            How strong is the evidence for Green Coffee Bean Extract and Overweight Management?
            
        
        

            We rate the evidence as Grade D (Very Early Research). This rating is based on 5 peer-reviewed studies with 142 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                
                

                
            

        

        

    


    
    












    

        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.