Elevated vitamin B12 levels are common and could be very serious

Question from a Member: My team and I have been stumped by elevated vitamin B12 that we have seen in a variety of outpatients. Including a 10-year-old boy who decompensated, had paranoid psychotic symptoms, and was started on clozapine. We work in a residential treatment center for ages 6 to 21 years. Any thoughts? It…