New research supports link between low vitamin D levels and increased Alzheimer’s risk

Researchers followed over 1,500 healthy elderly people for nearly six years and found that those with persistently low levels of vitamin D were up to 2.4 times more likely to develop Alzheimer’s compared to people with normal vitamin D levels.  The commonly accepted definition of vitamin D deficiency is a level below 30 nanomoles per liter, although this study used a level below 50 as a threshold.

While this study strengthens the association between low vitamin D and dementia risk, the researchers could not definitively rule out a phenomenon called “reverse causality,” meaning it is possible that low vitamin D levels did not cause the dementia and were associated with an increased risk in certain people for other reasons.  If that’s true, then vitamin D may not protect against Alzheimer’s even if low vitamin D levels predict decline. 

Read the Cognitive Vitality report on vitamin D for an overview of the evidence surrounding the link between vitamin D levels and dementia. 

Print
Disclaimer
This website does not provide, and should not be used for, medical advice, diagnosis, or treatment. You should consult with your healthcare providers when making decisions regarding your health. Your use of this site constitutes your agreement to the Terms & Conditions.

Sign up for more information!

To stay connected with us, please provide your contact details below. We will share the latest Alzheimer's and related research news, along with information on our signature events.


Fill out my online form.
Go to top