Association of vitamin D and cognition in people with type 2 diabetes: a systematic review.

Context: There is a high prevalence of vitamin D deficiency and impaired cognitive function in people with type 2 diabetes mellitus (T2DM).

Objective: To critically and systematically review the literature on the association between vitamin D status and cognitive performance in people with type 2 diabetes.

Data Sources: This review was conducted according to PRISMA recommendations.