Vitamin D Supplementation and Allergic Disease Prevention in Children

Vitamin D, a secosteroid acquired through skin synthesis and dietary intake, plays a pivotal role in immune regulation and lung development in early life. Adequate status of its primary circulating form, 25-hydroxyvitamin D (25(OH)D), in pregnant women and young children has been linked to a lower incidence of asthma, recurrent wheezing and other allergic manifestations. Epidemiological studies indicate that maternal deficiency during gestation may disrupt foetal lung morphogenesis and skew neonatal immune responses towards a pro-allergic phenotype. Postnatal supplementation strategies aim to restore vitamin D sufficiency during critical windows of immune maturation, with the goal of enhancing antimicrobial peptide production, regulating T-cell balance and modulating airway microbiota. While observational data frequently report inverse associations between 25(OH)D levels and allergic outcomes, interventional trials have yielded inconsistent results, reflecting variations in baseline status, timing of administration and dosing regimens. Mechanistic research suggests that vitamin D influences gene expression in pathways governing surfactant production, anti-inflammatory cytokine release and sphingolipid metabolism—processes integral to airway resilience. Globally, vitamin D supplementation represents a low-cost, scalable measure with potential to reduce the burden of childhood allergic disease, though optimal protocols remain to be defined through rigorously powered, long-term studies.

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Vitamin D Supplementation and Allergic Disease Prevention in Children publication trend

The graph below shows the total number of articles in vitamin d supplementation and allergic disease prevention in children across all publications each year (not limited to Nature Index journals).

Technical terms

25-Hydroxyvitamin D (25(OH)D): The main circulating form of vitamin D used to assess status in blood.

Cholecalciferol: Vitamin D3, the form commonly used in supplements and fortified foods.

Randomised controlled trial (RCT): A study design in which participants are randomly allocated to intervention or control groups to test efficacy.

Recurrent wheezing: Repeated episodes of a high-pitched, musical breathing sound often signalling airway inflammation in young children.

References

1. The Impact of Baseline 25-Hydroxyvitamin D Level and Gestational Age on Prenatal Vitamin D Supplementation to Prevent Offspring Asthma or Recurrent Wheezing. American Journal of Clinical Nutrition (2023).
2. Vitamin D Primary Prevention of Respiratory Infections and Asthma in Early Childhood: Evidence and Mechanisms. The Journal of Allergy and Clinical Immunology In Practice (2024).
3. Association of Maternal Gestational Vitamin D Supplementation with Respiratory Health of Young Children. Nutrients (2023).
4. Prenatal vitamin D supplementation reduces risk of asthma/recurrent wheeze in early childhood: A combined analysis of two randomized controlled trials. PLOS ONE (2017).
5. Prenatal Vitamin D Supplementation and Child Respiratory Health: A Randomised Controlled Trial. PLOS ONE (2013).
6. Vitamin D deficiency induces Th2 skewing and eosinophilia in neonatal allergic airways disease. Allergy (2014).
7. Vitamin D related genes in lung development and asthma pathogenesis. BMC Medical Genomics (2013).
8. Identification of vitamin D sensitive pathways during lung development. Respiratory Research (2016).
9. Maternal 25‐hydroxyvitamin D and its association with childhood atopic outcomes and lung function. Clinical & Experimental Allergy (2013).
10. Vitamin D intake in mid-pregnancy and child allergic disease – a prospective study in 44,825 Danish mother-child pairs. BMC Pregnancy and Childbirth (2013).
11. Early life vitamin D status and asthma and wheeze: a systematic review and meta-analysis. BMC Pulmonary Medicine (2018).
12. World Allergy Organization-McMaster University Guidelines for Allergic Disease Prevention (GLAD-P): Vitamin D. World Allergy Organization Journal (2016).