Study: Unnecessary Vitamin D may harm cognition

A recent study has confirmed that taking vitamin D supplements among seniors who already have sufficient levels of the vitamin may be associated with a faster decline in their cognitive abilities, such as memory, attention, and processing speed. The study involved 5,065 individuals over a period of six years, and it was found that approximately 40% of them regularly took supplements. The use of these supplements was linked to poorer cognitive performance, although the results do not prove that the supplements cause the decline. The study did not specify dosages, and the findings are observational and non-causal, with the possibility that people more prone to cognitive decline are also the ones more likely to take supplements. The results advise against relying on high-dose vitamin D sources to improve cognition in individuals with normal levels, emphasizing the importance of consulting a doctor for higher doses if there is a deficiency.

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