However, scientists do not yet consider this data as proof that the vitamin can treat or prevent dementia. Researchers continue to seek ways that could help people maintain memory and clarity of thought for as long as possible at the first signs of cognitive changes. One of the new studies focuses on **vitamin D** and its possible influence on brain function. The study was published in the scientific journal *Sleep Medicine*. More than 50 people participated in the research, all of whom had two factors that may accompany an increased risk of developing dementia: mild cognitive impairment and sleep disorders. Participants underwent cognitive function testing. Researchers also determined whether they took vitamin D, and when analyzing the results, they accounted for age, gender, body mass index, and education level. ### Result — Plus 13% The most interesting result was found among participants who took a sufficient daily dose of vitamin D. **Their scores on cognitive tests were approximately 13% higher** than those of people who did not take the vitamin. At the same time, researchers found a dependence of the results on dosage: taking lower doses did not demonstrate the same pronounced effect. The authors believe that the data obtained complements the accumulated knowledge about the possible role of vitamin D in brain function and aging processes. "Opportunities for maintaining brain health remain even when a person is just beginning to show cognitive changes," noted Emory University researcher Victoria Pak. ### But This Is Not a Cure for Dementia It is important to consider the scale of the study: it involved just over 50 people, and the work was **observational in nature**. This means that scientists found a correlation between vitamin D intake and higher test scores, but it cannot yet be claimed that the vitamin was the cause of improved memory. Therefore, one should not take increased doses of vitamin D on their own in hopes of preventing dementia. This is especially true for individuals who are already taking medications or have chronic diseases. ### What Else Is Really Important for the Brain The authors of the material also remind about another long-term study published in *Neurology*. It showed how important cardiovascular risk factors are in middle age. Three habits are particularly significant: **monitoring blood pressure, diabetes prevention and control, and quitting smoking**. New results provide grounds to continue studying vitamin D as one of the factors potentially associated with the preservation of cognitive functions. However, it is premature to speak of the vitamin as a remedy for dementia: a small observational study shows a correlation, not a proven therapeutic effect.
