This common vitamin was linked to 13% better cognitive scores

A new study from Emory University indicates that consuming higher amounts of vitamin D may improve cognitive scores in adults with an increased risk of dementia. The research involved 54 participants with sleep disturbances and mild cognitive impairments (MCI), conditions that can precede early-stage dementia. Those taking at least 5,000 IU of vitamin D daily scored more than 13% higher on the Montreal Cognitive Assessment (MoCA) test compared to those who did not take vitamin D, even after accounting for other factors.

MoCA assesses memory, thinking skills, and dementia risk. The study, published in Sleep Medicine, suggests that the timing of intervention is crucial, as MCI represents an intermediate stage between normal cognitive aging and dementia, offering an opportunity to support brain health. Both vitamin D2 and D3 forms showed similar cognitive performance benefits, highlighting the nutrient's role in sleep quality and sleep-wake cycles.

Sleep disturbances are prevalent among those with Alzheimer's disease, and vitamin D deficiency has been linked to sleep problems like insomnia. This is the first study to examine vitamin D supplement intake's relationship to cognitive function in a high-risk group experiencing both MCI and sleep disturbances. Funded by the National Institute on Aging, the research was conducted by Emory University's Nell Hodgson Woodruff School of Nursing and included Sirui Zhou, Paul Sudeshna, Lynn Marie Trotti, and Donald Bliwise.