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Niacinamide ： Acne

A

A systematic review found topical niacinamide (4%) showed comparable efficacy to 1% clindamycin for acne. Oral nicotinamide supports sebum regulation and anti-inflammatory effects through NF-kB modulation.

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            A

        

        

            
結論

            
            
A systematic review found topical niacinamide (4%) showed comparable efficacy to 1% clindamycin for acne. Oral nicotinamide supports sebum regulation and anti-inflammatory effects through NF-kB modulation.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
15

        
研究数

    

    

        
1200

        
参加者数

    

    

        
            
            ↑
            
        
        
Positive

    

    

        A

        
グレード

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
一般的な使用量

                

                    
                    

                        
general:

                        
14-16 mg/day NE (RDA)

                    

                    
                    

                        
skinhealth:

                        
500-1,500 mg/day oral nicotinamide

                    

                    
                

                
                

                    上限量： 35 mg/day for niacin (flushing form); nicotinamide well-tolerated up to 3,000 mg/day
                

                
            

            

            

            
            

                推奨摂取タイミング： With meals; can be split into 2-3 doses
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
報告されている副作用

                    
    
                        
                        
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                            ⚠
                            Generally well-tolerated (no flushing unlike niacin)
                        
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                            Mild gastrointestinal discomfort at high doses
                        
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                            Rare hepatotoxicity at very high doses (> 3,000 mg/day)
                        
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既知の相互作用

                    
    
                        
                        
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                            ●
                            Anticonvulsants (carbamazepine — may increase niacinamide levels)
                        
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                            ●
                            Hepatotoxic drugs (potential additive liver effect at high doses)
                        
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                            Isoniazid (competes for NAD+ pathways)
                        
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                        耐容上限摂取量： 35 mg/day for niacin (flushing form); nicotinamide well-tolerated up to 3,000 mg/day
                    

                

                
            

            

                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 Niacinamide help with Acne?
            
        
        

            Based on 15 studies with 1,200 participants, there is strong evidence from multiple clinical trials that Niacinamide may support Acne management. Our evidence grade is A (Strong Evidence).
        

    

    
    

        
            How much Niacinamide should I take for Acne?
            
        
        

            Studies have used various dosages. A commonly studied range is 14-16 mg/day NE (RDA). Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Niacinamide?
            
        
        

            Reported side effects may include Generally well-tolerated (no flushing unlike niacin), Mild gastrointestinal discomfort at high doses, Rare hepatotoxicity at very high doses (> 3,000 mg/day). Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

        
            How strong is the evidence for Niacinamide and Acne?
            
        
        

            We rate the evidence as Grade A (Strong Evidence). This rating is based on 15 peer-reviewed studies with 1,200 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                
                

                
                

                    
Niacinamide 他の症状・状態について

                    

                        
                        
                            UV Protection (Internal Photoprotection)
                            A

                        
                        
                    

                

                
            

        

        

    


    
    












    

        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。