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Biotin ： Hair, Skin & Nails Health

C

Biotin deficiency clearly causes skin and nail problems. However, systematic reviews have found limited evidence that supplementation above adequate intake levels improves outcomes in non-deficient individuals.

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            C

        

        

            
結論

            
            
Biotin deficiency clearly causes skin and nail problems. However, systematic reviews have found limited evidence that supplementation above adequate intake levels improves outcomes in non-deficient individuals.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
8

        
研究数

    

    

        
540

        
参加者数

    

    

        
            
            ↑
            
        
        
Positive

    

    

        C

        
グレード

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
一般的な使用量

                

                    
                    

                        
general:

                        
30 mcg/day (AI)

                    

                    
                    

                        
skinhairnails:

                        
2,500-5,000 mcg/day

                    

                    
                

                
                

                    上限量： No established UL (water-soluble); may interfere with lab tests at high doses
                

                
            

            

            

            
            

                推奨摂取タイミング： With meals for better absorption
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
報告されている副作用

                    
    
                        
                        
  • 
                            ⚠
                            Generally well-tolerated
                        
    • 
                        
                        
  • 
                            ⚠
                            May cause acne breakouts at high doses (> 5,000 mcg)
                        
    • 
                        
                        
  • 
                            ⚠
                            Interferes with troponin and thyroid laboratory tests
                        
    • 
                        
                    

                

                

                
                

                    
既知の相互作用

                    
    
                        
                        
  • 
                            ●
                            Laboratory test interference (troponin, thyroid panels, vitamin D assays)
                        
    • 
                        
                        
  • 
                            ●
                            Anticonvulsants (carbamazepine, phenytoin may reduce biotin levels)
                        
    • 
                        
                        
  • 
                            ●
                            Prolonged antibiotic use (may reduce gut biotin synthesis)
                        
    • 
                        
                    

                

                

                
                

                    

                        耐容上限摂取量： No established UL (water-soluble); may interfere with lab tests at high doses
                    

                

                
            

            

                サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does Biotin help with Hair, Skin & Nails Health?
            
        
        

            Based on 8 studies with 540 participants, there is limited but promising evidence that Biotin may support Hair, Skin & Nails Health management. Our evidence grade is C (Some Evidence).
        

    

    
    

        
            How much Biotin should I take for Hair, Skin & Nails Health?
            
        
        

            Studies have used various dosages. A commonly studied range is 30 mcg/day (AI). Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Biotin?
            
        
        

            Reported side effects may include Generally well-tolerated, May cause acne breakouts at high doses (> 5,000 mcg), Interferes with troponin and thyroid laboratory tests. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

        
            How strong is the evidence for Biotin and Hair, Skin & Nails Health?
            
        
        

            We rate the evidence as Grade C (Some Evidence). This rating is based on 8 peer-reviewed studies with 540 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                

                    
に関する他の成分： Hair, Skin & Nails Health

                    

                        
                        
                            Silicon (Silica)
                            C

                        
                        
                        
                            Keratin
                            D

                        
                        
                    

                

                

                
                

                    
Biotin 他の症状・状態について

                    

                        
                        
                            Dry Skin
                            D

                        
                        
                    

                

                
            

        

        

    


    
    












    

        FDAに関する免責事項:
        これらの記述は米国食品医薬品局（FDA）による評価を受けていません。本ウェブサイトの製品および情報は、疾病の診断、治療、治癒、または予防を目的としたものではありません。表示されているエビデンスグレードは、公開された査読済み研究の分析に基づいており、医療上の助言を構成するものではありません。サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。