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Niacinamide के लिए UV Protection (Internal Photoprotection)

A

The ONTRAC trial (NEJM 2015) found oral nicotinamide 500 mg twice daily reduced new nonmelanoma skin cancers by 23% and actinic keratoses by 11% in high-risk individuals, supporting cellular DNA repair via NAD+ replenishment.

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निष्कर्ष

            
            
The ONTRAC trial (NEJM 2015) found oral nicotinamide 500 mg twice daily reduced new nonmelanoma skin cancers by 23% and actinic keratoses by 11% in high-risk individuals, supporting cellular DNA repair via NAD+ replenishment.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
5

        
अध्ययन

    

    

        
686

        
प्रतिभागी

    

    

        
            
            ↑
            
        
        
Positive

    

    

        A

        
ग्रेड

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
सामान्य रूप से उपयोग की जाने वाली खुराकें

                

                    
                    

                        
general:

                        
14-16 mg/day NE (RDA)

                    

                    
                    

                        
skinhealth:

                        
500-1,500 mg/day oral nicotinamide

                    

                    
                

                
                

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

                
            

            

            

            
            

                सेवन का सर्वोत्तम समय: With meals; can be split into 2-3 doses
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
रिपोर्ट किए गए दुष्प्रभाव

                    
    
                        
                        
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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)
                        
    • 
                        
                    

                

                

                
                

                    
ज्ञात अंतःक्रियाएँ

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

                

                
            

            

                कोई भी सप्लीमेंट शुरू करने से पहले हमेशा अपने स्वास्थ्य सेवा प्रदाता से परामर्श करें।
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does Niacinamide help with UV Protection (Internal Photoprotection)?
            
        
        

            Based on 5 studies with 686 participants, there is strong evidence from multiple clinical trials that Niacinamide may support UV Protection (Internal Photoprotection) management. Our evidence grade is A (Strong Evidence).
        

    

    
    

        
            How much Niacinamide should I take for UV Protection (Internal Photoprotection)?
            
        
        

            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 UV Protection (Internal Photoprotection)?
            
        
        

            We rate the evidence as Grade A (Strong Evidence). This rating is based on 5 peer-reviewed studies with 686 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                

                    
इसके लिए अन्य सामग्री UV Protection (Internal Photoprotection)

                    

                        
                        
                            Nicotinamide
                            A

                        
                        
                        
                            Omega-3 Fatty Acids
                            B

                        
                        
                        
                            Green Tea Extract
                            B

                        
                        
                        
                            Astaxanthin
                            B

                        
                        
                        
                            Polypodium leucotomos
                            B

                        
                        
                        
                            Vitamin E
                            C

                        
                        
                    

                

                

                
                

                    
Niacinamide अन्य स्वास्थ्य स्थितियों के लिए

                    

                        
                        
                            Acne
                            A

                        
                        
                    

                

                
            

        

        

    


    
    












    

        FDA अस्वीकरण:
        इन कथनों का Food and Drug Administration द्वारा मूल्यांकन नहीं किया गया है। इस वेबसाइट पर उत्पादों और जानकारी का उद्देश्य किसी बीमारी का निदान, उपचार, इलाज या रोकथाम नहीं है। प्रस्तुत साक्ष्य ग्रेड प्रकाशित पीयर-रिव्यूड अनुसंधान के हमारे विश्लेषण पर आधारित हैं और चिकित्सा सलाह नहीं हैं। कोई भी सप्लीमेंट शुरू करने से पहले हमेशा अपने स्वास्थ्य सेवा प्रदाता से परामर्श करें।