Not a cause
Deficiency of any kind is not known to be a cause of schizophrenia
(a brain disorder).
The precise cause of schizophrenia is unknown. Some researchers suspect that environmental factors may increase the risk of triggering schizophrenia. Viruses, toxins or malnutrition while in the womb, stressful life circumstances, and taking psychoactive drugs during adolescence are also being studied, e.g.