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ST. LOUIS (KTVI) – How often do you walk into a room and say, ‘‘I came in here for something but I can’t remember” or ‘‘Where did I put my keys?” Is it the onset of dementia, Alzheimer’s, or simple forgetfulness?

SLU Geriatrician Dr. John Morley visits Fox 2 News in the Morning to say this may be a symptom of B12 deficiency.