Vitamin D3 During Pregnancy and Cognitive Performance at 10 Years
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.
Coverage & discussions
Hacker News · jamanetwork.com
Community discussions
Community Sentiment
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.
