Tag: Neuropsychiatric

The classic triad of pellagra—dermatitis, diarrhea, and dementia—reveals the devastating impact of niacin (vitamin B3) deficiency on multiple body systems. However, the spectrum of neurological manifestations extends beyond dementia, progressing from subtle mood changes to severe encephalopathy if left untreated.

According to a 2024 systematic review, vitamin B12 deficiency is an increasingly recognized cause of hallucinations, particularly visual and auditory ones. This critical nutritional imbalance can profoundly affect neurological function and is a key answer to the question, "What deficiency causes visual hallucinations?".