To explore the effects of maternal vitamin D supplementation on specific health outcomes in children, including respiratory infections, growth, and neurodevelopment.
Key Findings:
Vitamin D supplementation reduced respiratory tract infections in the first years of life in 11 of 16 studies.
Growth or bone development benefits were observed in 6 of 12 studies, but some studies showed no significant effects.
Positive effects on neurodevelopment and reduced autoimmune risk were noted, though further research is needed to clarify these associations.
High frequency of infant vitamin D insufficiency was associated with even 1600 IU/d supplementation, indicating potential inadequacy.
Interpretation:
Current vitamin D supplementation recommendations may not ensure adequate levels at birth, which could increase the risk of early-life infections and other health issues, necessitating a review of guidelines.
Limitations:
Very few studies measured maternal and infant vitamin D concentrations, limiting the ability to draw definitive conclusions.
Lack of consensus on optimal maternal vitamin D levels complicates recommendations and may lead to inconsistent practices.
Conclusion:
Further studies linking maternal and infant vitamin D levels to specific health outcomes, particularly in diverse populations, are needed to improve personalized nutritional advice during pregnancy and enhance next-generation health.
