Infant vitamin D review supports blood-level adequacy, with wider benefits uncertain
The clearest finding concerns vitamin D status in healthy, term infants; immune effects, respiratory protection and advantages of higher doses remain unsettled.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The review reports that daily vitamin D supplementation maintained adequate blood vitamin D levels in most healthy, term infants. That biochemical outcome is more clearly supported than proposed immune or respiratory benefits. The abstract does not establish a universally superior higher dose, and its conclusions leave benefits beyond infancy uncertain.
This abstract-based account lacks study counts, pooled effect estimates and a defined follow-up period. The authors also report variation in methods, starting vitamin D status and adherence that complicates comparisons.
What researchers found
Blood 25-hydroxyvitamin D levels
Daily 400 IU supplementation in healthy, term infants during infancy; comparator and follow-up length not reported.
Who the finding covers
The adequacy finding applies to healthy infants born at term. The review discusses greater deficiency risk with limited sunlight, darker skin pigmentation and northern residence, but does not establish a single dose for all infants.
What remains unresolved
Evidence on immune effects and respiratory protection was inconclusive. The authors also identify gaps in dose-response evidence and long-term safety, so maintaining a blood marker should not be read as proof of all proposed health benefits.
The original publication
Vitamin D supplementation in infancy: a revisited systematic review.
Mimouni FB, Agam A, Arad I et al.
Curr Opin Clin Nutr Metab Care · 2026
- PubMed ID
- 41665043
- Record checked
AI-assisted research and writing. This explains one selected publication; it is not a complete review of everything known. Our approach.
One more question, understood.
Keep track of the research you’ve explored.