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SleepCited

Vitamin D for Sleep Maintenance Insomnia

D

Based on 1 study with 4,552 total participants. Results are mixed across studies.

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The Bottom Line

            
            
There is insufficient evidence to determine whether vitamin D helps with staying asleep through the night — only one observational study exists on this specific topic.

            
            
            
    
                
                
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                    Only 1 observational study available — far too little evidence for conclusions
                
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                    The study found mixed results for vitamin D and sleep maintenance
                
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                    No RCTs or meta-analyses exist for this specific use
                
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                    Observational data cannot establish whether vitamin D directly helps
                
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Key Statistics





            


    

        
1

        
Studies

    

    

        
4552

        
Participants

    

    

        
            
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Mixed

    

    

        D

        
Grade

    




        


        
        
        

            

  
Referenced Papers





            

                
                

                    

                        
                            Sleep symptoms associated with intake of specific dietary nutrients.
                        
                        
                            
                                Other
                            
                            
                            
                        
                    

                    

                        Journal of sleep …
                        2014
                        
                        236 citations
                        
                    

                

                
            

        

        

        
        
        

            

  
Dosage & Usage





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


            
            

                
Commonly Used Dosages

                

                    
                    

                        
general:

                        
600-800 IU/day

                    

                    
                    

                        
deficiency:

                        
1,000-5,000 IU/day

                    

                    
                

                
                

                    Upper limit: 4,000 IU/day
                

                
            

            

            

            
            

                Best taken: Morning with a meal containing fat; avoid evening dosing
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Reported Side Effects

                    
    
                        
                        
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                            Hypercalcemia at high doses
                        
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                            Nausea
                        
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                            Constipation
                        
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                            Kidney stones (rare, with excessive intake)
                        
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Known Interactions

                    
    
                        
                        
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                            Corticosteroids — reduce calcium absorption, affecting vitamin D metabolism
                        
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                            Weight-loss drugs (orlistat) — may reduce vitamin D absorption
                        
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                            Statins — vitamin D may affect statin metabolism
                        
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                        Tolerable upper intake: 4,000 IU/day
                    

                

                
            

            

                Always consult your healthcare provider before starting any supplement.
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does Vitamin D help with Sleep Maintenance Insomnia?
            
        
        

            Based on 1 studies with 4,552 participants, there is preliminary evidence that needs more research that Vitamin D may support Sleep Maintenance Insomnia management. Our evidence grade is D (Very Early Research).
        

    

    
    

        
            How much Vitamin D should I take for Sleep Maintenance Insomnia?
            
        
        

            Studies have used various dosages. A commonly studied range is 600-800 IU/day. Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Vitamin D?
            
        
        

            Reported side effects may include Hypercalcemia at high doses, Nausea, Constipation, Kidney stones (rare, with excessive intake). Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

        
            How strong is the evidence for Vitamin D and Sleep Maintenance Insomnia?
            
        
        

            We rate the evidence as Grade D (Very Early Research). This rating is based on 1 peer-reviewed studies with 4,552 total participants. The overall direction of effect is mixed.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                

                    
Other ingredients for Sleep Maintenance Insomnia

                    

                        
                        
                            Tart Cherry
                            A

                        
                        
                    

                

                

                
                

                    
Vitamin D for other conditions

                    

                        
                        
                            Insomnia
                            A

                        
                        
                    

                

                
            

        

        

    


    
    












    

        FDA Disclaimer:
        These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.