Everyone knows that vitamin D is vital for healthy bones and a stronger immune system but could low levels be a major driver of Alzheimer’s and age-related cognitive decline?
Nov 13 2023Reviewed by Lily Ramsey, LLM
Vitamin D deficiency is well known to increase future risk of Alzheimer’s disease. In a study in France those with low vitamin D levels, below 50 nmol/L, had a nearly three-fold increased risk of Alzheimer’s. Over sixty per cent of people in the UK have lower levels than this. Professor Zahinoor Ismail, of the University of Calgary and the University of Exeter, who led the research, said: “We know that vitamin D has some effects in the brain that could have implications for reducing dementia. Overall, we found evidence to suggest that earlier supplementation might be particularly beneficial, before the onset of cognitive decline.”
All the evidence regarding cardiometabolic diseases, cancer, diabetes, infectious diseases and pregnancy outcomes shows that you need a blood level of vitamin D above 75 nmol/L to be healthy, and the same is proving true for the brain. This optimal level is impossible to achieve without supplementation in the winter. I recommend every adult and teenager supplements themselves with at least 1000 to 3000iu per day from October to March in line with a recent review by 35 vitamin D researchers.
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