07 Aug 2014 Blackmores Institute Link between vitamin d and dementia risk confirmed 07 Aug 2014 Share Share on LinkedIn Share on Facebook Share on Twitter Share on Google+ Share on Pinterest News Not getting enough vitamin D doubles the risk of developing dementia and Alzheimer's disease in older people, according to new research published in the August 6, 2014, online issue of Neurology. The UK study is the largest of its kind ever undertaken and looked at blood levels of vitamin D, which includes vitamin D from food, supplements and sun exposure. × To continue reading this article, please Log In or Sign Up for access.