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  6. Association Between Prenatal Vitamin D Supplementation And Respiratory Diseases In Children: A Systematic Review And Meta-analysis

Association between prenatal vitamin D supplementation and respiratory diseases in children: a systematic review and meta-analysis

Jieru Shen1, Zhonghui Zhou1, Fao Feng2

  • 1Department of Respiratory, Ningbo Municipal Hospital of Traditional Chinese Medicine (TCM), Affiliated Hospital of Zhejiang Chinese Medical University, No.819, Liyuan North Road, Haishu District, Ningbo, 315010, China.

BMC Pediatrics
|November 7, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Maternal vitamin D supplementation during pregnancy does not significantly impact respiratory or allergy-related outcomes in children. This meta-analysis found no evidence of benefit for conditions like asthma, wheezing, or eczema.

Area of Science:

  • Immunology
  • Pediatrics
  • Public Health

Background:

  • Maternal vitamin D status during pregnancy is crucial for offspring well-being, potentially influencing immunomodulation and respiratory health.
  • Existing evidence on vitamin D's effects on respiratory and allergy-related outcomes in children is conflicting.
  • A comprehensive synthesis of data is needed to clarify the role of prenatal vitamin D supplementation.

Purpose of the Study:

  • To systematically review and synthesize evidence from randomized controlled trials (RCTs) on the effects of maternal vitamin D intake during pregnancy.
  • To evaluate the impact of prenatal vitamin D supplementation on respiratory and allergy-related outcomes in children.
  • To provide a clear direction based on synthesized evidence regarding vitamin D's role in child respiratory and allergic health.

Main Methods:

Keywords:
Meta-analysisRespiratory outcomeSystematic reviewVitamin d

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  • Conducted systematic searches across major databases (PubMed, Scopus, Web of Science, Cochrane Library) until August 2025.
  • Included randomized controlled trials (RCTs) assessing maternal vitamin D intake during pregnancy and child outcomes.
  • Evaluated evidence quality using the GRADE method and study quality using the Cochrane risk-of-bias tool.

Main Results:

  • Seven RCTs were included in the analysis.
  • Prenatal vitamin D supplementation showed no significant effect on respiratory outcomes, including respiratory tract infections (RTI), asthma, and wheezing.
  • No significant association was found between maternal vitamin D supplementation and eczema, allergic conditions, or immunoglobulin E (IgE) levels in children.

Conclusions:

  • Maternal vitamin D supplementation during pregnancy does not demonstrate a significant impact on respiratory or allergy-related outcomes in children.
  • The current evidence suggests no benefit of prenatal vitamin D supplementation for preventing common respiratory and allergic conditions in offspring.
  • Further research may be warranted to explore specific subgroups or alternative vitamin D supplementation strategies.