SleepCited

Vitamin D for Sleep Maintenance Insomnia

D Preliminary

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

Key Statistics

1

Studies

4552

Participants

↔

Mixed

D Preliminary

Grade

Referenced Papers

Sleep symptoms associated with intake of specific dietary nutrients. Other
Journal of sleep … 2014 236 citations

Dosage & Usage

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

  • ⚠ Hypercalcemia at high doses
  • ⚠ Nausea
  • ⚠ Constipation
  • ⚠ Kidney stones (rare, with excessive intake)

Known Interactions

  • ● Corticosteroids — reduce calcium absorption, affecting vitamin D metabolism
  • ● Weight-loss drugs (orlistat) — may reduce vitamin D absorption
  • ● Statins — vitamin D may affect statin metabolism

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 (Preliminary).
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 (Preliminary). 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 D Preliminary

Vitamin D for other conditions

Insomnia A Strong

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.