Medical Xpress | Vitamin D deficiency linked to increased risk of dementia and Alzheimer's disease Medical Xpress The study showed that those moderately deficient in vitamin D had a 53 percent higher risk of developing dementia and for those who were severely deficient, the risk was 125 percent higher. Similar outcomes were observed for Alzheimer's disease. How to reduce the risk of Alzheimer's disease Study links vitamin D deficiency to increased risk for Alzheimer's, dementia Study confirms link between dementia and vitamin D |