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Do Vitamin D Deficiency and Cognitive Decline Go Hand‐in‐Hand?

been known to assist calcium absorption in the body, investigators have begun to explore, as well, its role in supporting cognitive function and preventing dementia. But exactly what that role is requires further research, according to the lead investigators of three studies published online Nov. 25 ahead of the Jan. 5 print edition of Neurology. Two independent research groups showed a connection between vitamin D deficiency and cognitive decline in cross-sectional studies, while the third found no statistically significant association in a longitudinal study. Although the findings were inconclusive, the investigators agreed on this point: Clinicians need to be careful in prescribing supplements, because it is