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It's almost as if this is the year for vitamin D.  Every now and then, a particular vitamin, medication, food group, or supplement becomes a major source of studies and reports.  Lately, it's vitamin D.  The latest research is a European study which suggests that people with low levels of vitamin D scored worse on a test of cognitive ability.  Over 3,100 men between the ages of 40 and 79 were in the study.  According to the research, as vitamin D levels fell, so did the performance on those being tested.  Those over 60 seemed to show the greatest relationship.  Does this mean that vitamin D can help prevent Alzheimer's or other forms of dementia?  This has not been shown, but it's clear that a balanced diet makes sense and vitamin D, at least in recommended amounts, doesn't seem to hurt.  It's an interesting study and an important one to listen to.  

By: Brian McDonough, M.D., FAAFP