Times Gazette | Vitamin D deficiency tied to dementia and Alzheimer's among elderly Times Gazette “We were not particularly surprised by our findings because there is a recent and growing literature on the associations between vitamin D status and risk of Alzheimer's disease/dementia, cognitive decline, and brain atrophy,” study co-author Dr. Joshua W. Lower level of Vitamin D could increase risk of Dementia and Alzheimer's in ... Vitamin D can help fight Alzheimer's and dementia in old Low vitamin D levels may increase risk for Alzheimer's |