Research published in ‘Neurology’ journal recently found people moderately deficient in vitamin D had a 53% higher risk of dementia. There was a 125% increased risk in people severely deficient in vitamin D, who also had a 122% increased risk of Alzheimer’s.
Older people’s skin can be less efficient at converting sunlight into Vitamin D, making them more likely to be deficient and reliant on other sources. The international team of researchers, led by Dr David Llewellyn at the University of Exeter Medical School, followed people for 6 years.
You can read the abstract here:
I note the researchers initially thought that the brain-protective level would be 25- 50nmol/l, but it turns out actually to be over 50 that is the most cognitively protective. Not news to me or most of us in the nutrition business: clinically, I aim for 100-200nmol on test results especially for at risk people.
I have written tons on Vitamin D in the past, as you know. Here is a good overview for you, and do search for ‘Vitamin D’ using the search box to find much more..