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Vitamin A (Retinol)
Vitamin A (Retinol)

vitamin

别名: Retinol, Retinyl Palmitate, Retinyl Acetate, Beta-Carotene (provitamin A), Preformed Vitamin A

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About





            

                
Vitamin A binds retinoic acid receptors (RARs) in skin cells to regulate keratinocyte differentiation, stimulate epidermal turnover, upregulate collagen gene expression, and inhibit matrix metalloproteinases (MMPs) that degrade collagen and elastin. While topical retinoids are the gold standard for photoaging and acne, oral vitamin A at RDA levels supports these processes from within.

            

        

        

        
        
        

            

  
How It Works





            

                
Binds retinoic acid receptors (RARs) in skin cells to regulate keratinocyte differentiation, stimulate epidermal turnover, upregulate collagen gene expression, and inhibit matrix metalloproteinases (MMPs) that degrade collagen and elastin.

            

        

        

        
        
        

            

  
Evidence For Conditions





            

                

                    

                        
                            

                                健康状况
                                等级
                                研究数量
                                受试者
                                
                            

                        
                        
                            
                            

                                
                                    
                                        Acne
                                    
                                
                                
                                    C

                                
                                
                                    6
                                
                                
                                    400
                                
                                
                                    
                                        查看 →
                                    
                                
                            

                            
                            

                                
                                    
                                        Aging Skin & Wrinkles
                                    
                                
                                
                                    C

                                
                                
                                    5
                                
                                
                                    300
                                
                                
                                    
                                        查看 →
                                    
                                
                            

                            
                            

                                
                                    
                                        Keratosis Pilaris
                                    
                                
                                
                                    D

                                
                                
                                    2
                                
                                
                                    100
                                
                                
                                    
                                        查看 →
                                    
                                
                            

                            
                        
                    

                

            

        

        

        
        
        

            

  
Side Effects





            
    
                
                
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                    Headache and nausea at high doses
                
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                    Skin dryness and peeling (hypervitaminosis A)
                
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                    Liver toxicity with chronic excess
                
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  • 
                    
                    Birth defects (teratogenic — pregnancy contraindication)
                
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Drug & Supplement Interactions





            
    
                
                
  • 
                    
                    Retinoid medications (additive toxicity risk — do not combine)
                
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                    Tetracycline antibiotics (increased intracranial pressure risk)
                
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                    Anticoagulants (high-dose vitamin A may increase bleeding risk)
                
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  • 
                    
                    Hepatotoxic drugs (additive liver stress)
                
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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





            

                
                
                    Vitamin C
                    
                
                
                
                    Vitamin E
                    
                
                
                
                    Vitamin D
                    
                
                
                
                    Biotin
                    
                
                
                
                    Niacinamide
                    
                
                
            

        

        
    


    
    












    

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