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Vitamin D
Vitamin D

vitamin

别名: Cholecalciferol (D3), Ergocalciferol (D2), Calciferol, Sunshine Vitamin

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About





            

                
Vitamin D is a secosteroid hormone produced in skin via UVB exposure that regulates keratinocyte differentiation, supports antimicrobial peptide production (cathelicidin), modulates immune responses, and supports wound healing. A systematic review found vitamin D deficiency is significantly associated with increased severity of atopic dermatitis, psoriasis, and vitiligo.

            

        

        

        
        
        

            

  
How It Works





            

                
Secosteroid hormone produced in skin via UVB exposure; regulates keratinocyte differentiation, supports antimicrobial peptide (cathelicidin) production, modulates immune responses in skin, and supports wound healing through calcium-dependent signaling.

            

        

        

        
        
        

            

  
Evidence For Conditions





            

                

                    

                        
                            

                                健康状况
                                等级
                                研究数量
                                受试者
                                
                            

                        
                        
                            
                            

                                
                                    
                                        Psoriasis
                                    
                                
                                
                                    B

                                
                                
                                    16
                                
                                
                                    2200
                                
                                
                                    
                                        查看 →
                                    
                                
                            

                            
                            

                                
                                    
                                        Eczema (Atopic Dermatitis)
                                    
                                
                                
                                    B

                                
                                
                                    12
                                
                                
                                    1800
                                
                                
                                    
                                        查看 →
                                    
                                
                            

                            
                            

                                
                                    
                                        Vitiligo
                                    
                                
                                
                                    D

                                
                                
                                    4
                                
                                
                                    300
                                
                                
                                    
                                        查看 →
                                    
                                
                            

                            
                        
                    

                

            

        

        

        
        
        

            

  
Side Effects





            
    
                
                
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                    Generally well-tolerated at recommended doses
                
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                    Hypercalcemia at very high doses (nausea, vomiting, weakness)
                
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                    Kidney stones (rare, at excessive doses)
                
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Drug & Supplement Interactions





            
    
                
                
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                    Thiazide diuretics (may increase calcium levels)
                
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                    Corticosteroids (may reduce vitamin D absorption)
                
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                    Orlistat and cholestyramine (reduce absorption of fat-soluble vitamins)
                
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                    Calcipotriene (additive vitamin D effect)
                
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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 A (Retinol)
                    
                
                
                
                    Biotin
                    
                
                
                
                    Niacinamide
                    
                
                
            

        

        
    


    
    












    

        FDA 免责声明:
        这些声明未经美国食品药品监督管理局（FDA）评估。本网站上的产品和信息无意用于诊断、治疗、治愈或预防任何疾病。所展示的证据等级基于我们对已发表的同行评审研究的分析，不构成医疗建议。在开始任何补充剂方案之前，请务必咨询您的医疗保健提供者。