How True Is The New Study That Claims Vitamin D Supplements Reduce the Risk of Alzheimer's Disease By 40%?

The connection between Alzheimer's disease (AD) and vitamin D status has been known for some time. A 2015 review of the literature concluded that being deficient in vitamin D presented a 21% greater chance of developing Alzheimer's compared to those with adequate levels of vitamin D above 50 nmol/L. Researchers at the University of Calgary's Hotchkiss Brain Institute in Canada and the University of Exeter in England explored the relationship between vitamin D supplementation and dementia in more than 12,388 subjects. They found that subjects who had a history of vitamin D supplementation were 40% less likely to develop Alzheimer’s disease. The results are exaggerated due to normal statistical trickery, but there is still a strong correlation. I will break the study down and explain the real results. I will also give my two cents on whether you should supplement.

Scott Solomons, DDSMarch 20, 2023Vitamin D, Alzheimer's Disease, National Alzheimer's Coordinating Center, University of Calgary's Hotchkiss Brain Institute, Dementia, Relative Risk Reduction, Absolute Risk ReductionComment