Attention has turned to bioenergetics, or energy production in the brain cells. It is well known that people with schizophrenia are three times more likely to develop diabetes. A common debate in the field is whether the antipsychotic medications, which are known to cause weight gain and diabetes, are to blame. Recent research suggests that this is not the entire explanation. Even people newly diagnosed with schizophrenia appear to already have insulin resistance, even though most don’t yet have diabetes. This means that their brains may not be getting enough energy from glucose.