Micronutrients & recovery
Low serum 25-hydroxyvitamin D concentrations (specifically <50 nmol/L) are associated with a significantly increased risk of incident all-cause dementia and Alzheimer's disease in elderly adults.
This study suggests that maintaining vitamin D levels above 50 nmol/L may be associated with a lower risk of dementia in older adults. However, it does not prove that taking supplements will prevent dementia. You should discuss your vitamin D levels with your doctor to ensure they are within a healthy range for your overall health, but do not expect supplements alone to guarantee cognitive protection.
Our results confirm that vitamin D deficiency is associated with a substantially increased risk of all-cause dementia and Alzheimer disease.
Why this rating
High-quality observational evidence (prospective cohort, large N=1658, rigorous adjudication), but limited by potential residual confounding and lack of randomization.
Source
Vitamin D and the risk of dementia and Alzheimer disease
Thomas J. Littlejohns et al. · Neurology · 2014
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