Vitamin D Linked to Lower Dementia Biomarker

Irish-led research, primarily by University of Galway, found an association between higher vitamin D levels in middle-aged individuals and lower levels of tau protein in the brain years later, a biomarker for Alzheimer's disease. The study, co-led by Emer McGrath and Martin David Mulligan, involved nearly 800 participants from the Framingham Heart Study. While the findings suggest vitamin D could be an important factor for future brain health and a potential target to reduce preclinical dementia risk, researchers emphasize that it does not prove cause and effect. Further clinical trials are needed to determine if vitamin D supplements can prevent dementia. The study was published in Neurology Open Access, a journal of the American Academy of Neurology.