Two studies presented at the annual meeting of the American Academy of Neurology indicate that elderly people with lower levels of vitamin D are more likely to suffer from cognitive impairment.
We ve been saying that vitamin D is very much in vogue for the past few months, says Dr. Whelan. This is definitely going to catch people's attention. Of course, it s an interesting hypothesis, but there is no cause and effect proven here.
Well it s impossible to prove cause and effect with a retrospective study, says Dr. Ross. They only tested 150 people, and all of them had vitamin D levels above the normal threshold. Still, they found a strong correlation between higher blood levels of vitamin D and higher standardized test scores, so it is interesting.
