Higher Serum Vitamin D<sub>3</sub> Levels Are Associated with Better Cognitive Test Performance in Patients with Alzheimer’s Disease

Abstract

These data support the idea that a relationship exists between vitamin D status and cognition in patients with probable AD. However, given the cross-sectional design of this study, no causality can be concluded. Further prospective studies are needed to specify the contribution of vitamin D status to the onset and course of cognitive decline and AD.