Children whose mothers had higher vitamin D levels during pregnancy scored better on tests of memory, attention and problem-solving skills at ages 7 to 12 compared with those whose mothers had lower levels. That is a key finding of a new peer-reviewed study that my colleagues and I published in The American Journal of Clinical Nutrition.
While vitamin D has long been known for its role in maintaining bone health, scientists have since uncovered its importance in regulating immune function, reducing inflammation and protecting the nervous system. Now, growing evidence – including our new findings – suggest it may also support brain development beginning in the womb.
My team and I found that the link between prenatal vitamin D levels and childhood cognition was strongest among Black families, who also face higher rates of vitamin D deficiency.
This suggests that vitamin D supplementation may be a promising, low-cost strategy to support brain development while reducing racial disparities. Our study also suggested that vitamin D levels early in pregnancy may be most important for childhood cognitive development, highlighting the importance of early action by health care providers.
