This common vitamin was linked to 13% better cognitive scores

A recent study conducted by Emory University researchers suggests that higher intake of vitamin D supplements may be linked to improved cognitive performance in adults with an increased risk of developing dementia. The study involved 54 participants with sleep disturbances and mild cognitive impairments (MCI), both of which can be early signs of dementia.

Participants who took at least 5,000 IU of vitamin D daily performed better on cognitive function tests than those who did not take vitamin D, scoring more than 13% higher on the Montreal Cognitive Assessment (MoCA) test. The researchers adjusted for other factors and found that lower daily doses of vitamin D did not show the same cognitive benefits.

The timing of the intervention was also considered, as MCI is an intermediate stage between normal cognitive aging and dementia. The study highlights the potential importance of modifiable factors, such as vitamin D intake, during the earlier stages of cognitive decline to support brain health. Vitamin D is known to play a role in sleep quality and sleep-wake cycles, and sleep problems are common among people with Alzheimer's disease. The study was funded by the National Institute on Aging and published in Sleep Medicine.