Inadequate vitamin D intake associated with higher incidence of cognitive problems

A decline in cognitive performance is a natural consequence of ageing. It has been suggested, however, that vitamin D status may have an impact on the cognitive function of elderly people.
It is believed that vitamin D may bind to neuron receptors in the brain and develop anti-neurodegenerative, anti-inflammatory and antioxidant effects. For this reason, it is important to maintain an adequate vitamin D status in order to prevent deficiency and potential cognitive decline.
In one study, a total of 5596 women not taking vitamin D supplements were divided into two groups - one group consuming insufficient vitamin D (less than 35 mcg a week) and the other whose intake corresponded to the recommended amount (more than 35 mcg a week). Compared with the women with the recommended intake, those with an insufficient intakeobtained lower scores in a questionnaire to determine mental state. Inadequate vitamin D consumption was more commonly linked to cognitive problems.

(Neurology, Volume 74, Issue 1, Pages 27-32, doi : 10.1212/WNL.ob13e3181f6352)