A study on 1658 participants showed that people with low levels of vitamin D have about twice higher risk of developing dementia.
Vitamin D and the risk of dementia and Alzheimer disease
- Thomas J. Littlejohns, MSc, et al. Vitamin D and the risk of dementia and Alzheimer disease
- A thorough description of this study can be found under the link Lack of vitamin D may ‘raise dementia risk’
An information about how to maintain proper serum witamin D levels can be found here: