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SkinCited

Green Tea Extract
Green Tea Extract

herb

别名: EGCG, Camellia sinensis Extract, Green Tea Polyphenols, GTE

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About





            

                
Green tea extract is rich in catechin polyphenols, particularly EGCG, which inhibits UV-induced MMP expression and reduces NF-kB activation. A systematic review found oral green tea polyphenols (250-1,080 mg/day) increased the minimal erythema dose by approximately 25%, providing internal photoprotection.

            

        

        

        
        
        

            

  
How It Works





            

                
Rich in catechin polyphenols, particularly epigallocatechin-3-gallate (EGCG); potent antioxidant that inhibits UV-induced MMP expression, reduces NF-kB activation, may protect against DNA damage, and modulates inflammatory cascades in photoaged skin.

            

        

        

        
        
        

            

  
Evidence For Conditions





            

                

                    

                        
                            

                                健康状况
                                等级
                                研究数量
                                受试者
                                
                            

                        
                        
                            
                            

                                
                                    
                                        UV Protection (Internal Photoprotection)
                                    
                                
                                
                                    B

                                
                                
                                    8
                                
                                
                                    450
                                
                                
                                    
                                        查看 →
                                    
                                
                            

                            
                            

                                
                                    
                                        Acne
                                    
                                
                                
                                    D

                                
                                
                                    3
                                
                                
                                    150
                                
                                
                                    
                                        查看 →
                                    
                                
                            

                            
                        
                    

                

            

        

        

        
        
        

            

  
Side Effects





            
    
                
                
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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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Drug & Supplement Interactions





            
    
                
                
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                    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)
                
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                请务必告知您的医疗保健提供者您正在服用的所有补充剂。
            

        

        

        
        
        

            

  
Related Ingredients





            

                
                
                    Aloe Vera
                    
                
                
                
                    Turmeric (Curcumin)
                    
                
                
                
                    Grape Seed Extract
                    
                
                
                
                    Saw Palmetto
                    
                
                
            

        

        
    


    
    












    

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