Vitamin D Supplementation in Children with Asthma: An Umbrella Review.
Liu J; Long Y; Yang Z · 2026 · Nutrients
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
Abstract (excerpt)
Background Growing 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. Methods…
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Metadata source: Europe PMC · DOI 10.3390/nu18101560