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Vitamin D3 During Pregnancy and Cognitive Performance at 10 Years

High-Dose Vitamin D 3 Supplementation During Pregnancy and Test-Based Cognitive Performance at Age 10 Years: A

jamanetwork.com

June 7, 2026

19 min read

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Summary

High-dose vitamin D3 supplementation during pregnancy has been linked to improved cognitive performance in children at age 10. Vitamin D plays a crucial role in brain development, and its deficiency is common among pregnant women.

Key Takeaways

High-dose vitamin D3 supplementation during pregnancy is hypothesized to positively affect cognitive performance in children evaluated at age 10 years.
Prenatal vitamin D deficiency has been linked to neuropsychiatric disorders such as autism spectrum disorder and attention-deficit/hyperactivity disorder.
Previous studies on prenatal vitamin D supplementation have shown inconsistent results regarding its impact on neurodevelopment and cognitive outcomes in children.
The Copenhagen Prospective Study on Neuro-Psychiatric Development (COPSYCH) is assessing cognitive and psychopathological outcomes in children from a cohort of 700 mother-child pairs.

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Community Sentiment

Mixed

Positives

The study highlights the potential cognitive benefits of high-dose vitamin D3 supplementation during pregnancy, suggesting it may enhance verbal and visual memory in children.
The use of AI tools for post hoc secondary analysis of studies could significantly streamline research processes, making it easier to derive insights from existing data.

Concerns

The study's limited sample size and the fact that only one cognitive measure remained significant after correction raise concerns about the validity of the findings.
Critics argue that the study's design lacks generalizability due to its focus on a specific demographic in Denmark, potentially overlooking variations in vitamin D needs across different populations.
The association between vitamin D and cognitive performance appears weak, with many measures failing to show significant results, which questions the robustness of the conclusions drawn.