Schizophrenia and Vitamin B12

As you know, vitamin B12 is a critical nutrient for brain and nervous system health. Deficiencies commonly occur due to diet or poor assimilation. Here is a report published in the journal General Hospital Psychiatry describing a psychotic episode resulting from cobalamin (vitamin B12) deficiency. Interestingly, this occurred without any hematologic (blood) symptoms or preceding neurological manifestations. I have personally seen a case like the one described here.