Researchers found that older adults with mild cognitive impairment (MCI) and sleep problems who took at least 5,000 IU of vitamin D daily scored over 13% higher on cognitive tests compared to those who did not take the vitamin. This study, conducted by Emory University, suggests that higher vitamin D intake could be a modifiable factor worth exploring for improving cognitive performance during the early stages of cognitive decline.

This discovery is particularly relevant for individuals concerned about aging and cognitive health. With more than 7 million Americans currently living with Alzheimer’s dementia — a number expected to rise to nearly 13 million by 2050 — finding effective interventions is crucial. The study focused on 54 older adults experiencing both mild cognitive impairment and sleep disturbances, conditions that can signal the onset of dementia. The significant improvement in cognitive scores among those taking higher doses of vitamin D highlights its potential role in supporting brain health.

The evidence comes from a small human trial, which means while the findings are promising, they are not yet definitive. The study specifically examined participants who were already at risk for cognitive decline, making it an important early-stage exploration. The researchers also noted that the form of vitamin D (D2 or D3) did not seem to affect cognitive outcomes, indicating that both types may be beneficial.

For those looking to potentially enhance their cognitive health, considering a vitamin D supplement could be worthwhile, especially if you are experiencing sleep disturbances or have concerns about cognitive decline. However, it’s essential to consult with a healthcare provider before starting any new supplement regimen.