SynthesisNutrients2026
Vitamin D Supplementation in Children with Asthma: An Umbrella Review.
Synthesis in Nutrients, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
0 citing papers in PubMed.
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Corrections and comments
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Authors and funding
3 authors.
Funding
Abstract
backgroundGrowing evidence suggests that vitamin D plays a role in the pathophysiology of childhood asthma. However, its effectiveness in reducing asthma exacerbations and improving asthma-related outcomes remains controversial.
methodsWe systematically searched PubMed, Embase, and the Cochrane Library from inception to 25 February 2026. Meta-analyses of randomized controlled trials (RCTs) evaluating the effects of vitamin D supplementation on any health outcomes in children with asthma were included. Methodological quality was assessed using the AMSTAR 2 tool. The credibility of evidence was evaluated using pre-specified evidence classification criteria, and the certainty of evidence was graded using the GRADE approach.
resultsA total of 14 systematic reviews were included, of which one was rated as high quality, six as low quality, and seven as critically low quality according to AMSTAR 2. Vitamin D supplementation significantly increased serum 25-hydroxyvitamin D levels in children with asthma (MD = 10.68 ng/mL; 95% CI, 6.30 to 15.05;
conclusionsThis umbrella review found no convincing evidence that vitamin D supplementation improves asthma control, reduces exacerbations, or enhances lung function in children with asthma, despite its effect on increasing serum 25-hydroxyvitamin D levels and a possible benefit for asthma recurrence. However, these findings should be interpreted with caution, considering that the available evidence was limited by generally low methodological quality, substantial overlap among meta-analyses, and incomplete reporting of clinically relevant modifiers.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.