Vitamin D and Sleep Quality Interactions
Summary
Vitamin D, primarily obtained through cutaneous synthesis under ultraviolet B radiation and to a lesser extent from dietary sources, is recognised not only for its role in skeletal health but also for its influence on sleep regulation. The circulating form, 25-hydroxyvitamin D, engages with central nervous system pathways implicated in circadian rhythm and sleep architecture, including modulation of serotonergic and dopaminergic neurotransmission. Epidemiological evidence indicates that insufficient vitamin D status is linked to shorter sleep duration, diminished sleep efficiency and an increased risk of sleep disorders such as insomnia and restless legs syndrome. Conversely, adequate levels may support the maintenance of regular sleep–wake cycles, particularly in populations with limited sun exposure or higher latitudes. These interactions carry global significance, suggesting that public health strategies addressing vitamin D deficiency could yield benefits for sleep health and broader well-being.
Research from Nature Portfolio
A large cross-sectional analysis examined the interplay between sun exposure, vitamin D status and habitual sleep duration in over 25 000 participants. While vitamin D alone did not predict sleep length across the whole cohort, individuals with both low sun exposure and excessive sleep showed significantly lower 25-hydroxyvitamin D concentrations than those with normative sleep patterns. The findings underline the complex interdependence of environmental light, nutritional status and sleep regulation, emphasising that in conditions of minimal sunlight individuals may require alternative means to maintain sufficient vitamin D levels to support healthy sleep duration.
Vitamin D and Sleep Quality Interactions publication trend
The graph below shows the total number of articles in vitamin d and sleep quality interactions across all publications each year (not limited to Nature Index journals).
Technical terms
25-hydroxyvitamin D (25(OH)D): The primary circulating form of vitamin D used to assess vitamin D status.
Pittsburgh Sleep Quality Index (PSQI): A self-reported questionnaire that evaluates sleep quality and disturbances over a one-month period.
Randomised Controlled Trial (RCT): An experimental design in which participants are randomly allocated to intervention or control groups to assess the efficacy of treatments.
Meta-analysis: A statistical technique that combines results from multiple studies to derive pooled estimates of effect size.
References
- The Association between Vitamin D Deficiency and Sleep Disorders: A Systematic Review and Meta-Analysis. Nutrients (2018).
- Vitamin D Supplementation and Sleep: A Systematic Review and Meta-Analysis of Intervention Studies. Nutrients (2022).
- The Role of Vitamin D in Sleep Disorders of Children and Adolescents: A Systematic Review. International Journal of Molecular Sciences (2022).
- Relationship between Sleep Duration, Sun Exposure, and Serum 25-Hydroxyvitamin D Status: A Cross-sectional Study. Scientific Reports (2020).
About these summaries
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