Vitamin D and the risk of dementia and Alzheimer disease

This study examined whether low levels of vitamin D are linked to increased risks of dementia and Alzheimer’s disease. Tracking 1,658 older adults for an average of 5.6 years, researchers found that individuals with severe vitamin D deficiency had over twice the risk of developing dementia or Alzheimer’s compared to those with sufficient levels. Vitamin D deficiency was associated with increased neurodegenerative and vascular risks, potentially due to its role in reducing brain inflammation and supporting neural health. These findings highlight the importance of adequate vitamin D levels in maintaining brain health as we age.

To support brain health, aim for adequate vitamin D levels through safe sun exposure, dietary sources like fatty fish, or supplements if needed. This recommendation aligns with the study's findings but should be balanced against its observational nature, which cannot establish causation. Consult a healthcare provider to ensure supplementation is necessary and safe, as excessive vitamin D intake has risks and may not benefit all individuals.