Vitamin D Supplementation and sleep: A Systematic Review and Meta-Analysis of Intervention Studies

This systematic review and meta-analysis evaluated 19 studies on the effects of vitamin D supplementation (VDS) on sleep quality, duration, and disorders. Results showed that VDS improved sleep quality, with significant reductions in the Pittsburgh sleep Quality Index scores. However, evidence for improvements in sleep duration or specific disorders like restless legs syndrome was inconsistent. The review suggests that vitamin D may regulate sleep through brain pathways involving melatonin, but further studies are needed to confirm mechanisms and broader benefits.

If experiencing poor sleep quality, consider boosting vitamin D levels through safe sun exposure, vitamin D-rich foods, or supplements. Consult a healthcare provider for appropriate dosages. Pairing this with regular sleep routines may improve outcomes. Evidence supports modest sleep quality benefits but varies across populations.