Vitamin D supplementation has no effect on cognitive performance after four months in mid-aged and older subjects.


Tromsø Endocrine Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway; Division of Internal Medicine, University Hospital of North Norway, Tromsø, Norway. Electronic address: [Email]


Low serum 25-hydroxyvitamin D (25(OH)D) levels are associated with impaired cognitive function, but the effect of vitamin D supplementation on cognitive function is uncertain.


Cognition,Randomized controlled trial,Vitamin D,