Common Daily Vitamin Linked to 13% Cognitive Boost in Early Dementia, Study Shows

A small observational study linked daily vitamin D use to higher cognitive scores in adults 50+ with mild cognitive impairment and sleep problems.

People reporting 5,000 IU or more per day scored about 13% higher on the MoCA test than non-users; lower doses were not statistically significant.

The result is preliminary and does not prove vitamin D improves cognition, so larger controlled trials are needed.