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Med Hypotheses. 2018 Sep;118:74-77. doi: 10.1016/j.mehy.2018.06.022. Epub 2018 Jun 20.

Ketogenic diet for schizophrenia: Nutritional approach to antipsychotic treatment.

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Department of Psychiatry, Faculty of Medicine, Medical University of Gdańsk, Gdańsk, Poland. Electronic address:
Department of Psychiatry, Faculty of Medicine, Medical University of Gdańsk, Gdańsk, Poland.


Schizophrenia is a mental disorder that mostly appears in the second or third decade of life with no consistent appearance. The first-line pharmacological treatment are antipsychotic drugs, which mainly act by suppressing the activity of dopamine. Unfortunately many of schizophrenic patients suffer from persistent positive or negative symptoms that cannot be fully treated with available medication. With exploration on the possible causes of the disease there is evidence on dopaminergic transmission defects, there is a need to find more holistic way in treating the disease and a diet regimen could be one of them. Ketogenic diet, which is a popular diet regimen that consists in low-carbohydrate (about 30-50 g/day), medium-protein (up to 1 g/kg daily) and high-fat intake (around 80% of daily calories) mainly known for its helpful role in weight-loss. The key mechanism is to generate ketosis. A state in which ketones bodies in the blood provides energy part of the body's energy comes from ketone bodies in the blood. Possible hypothesis can be that ketogenic diet changes the ratio of GABA:glutamate in favor of GABA, by suppressing the catabolism and increasing the synthesis of GABA as well as glutamate metabolism, which could help to compensate the disrupted GABA levels in schizophrenic brain, leading to possible better outcome of the disease regarding symptomatology and preventing the weight-gain regarding some medications used and the correlating diseases responsible for weight gain.


Dietary intervention; GABA-ergic activity; Ketogenic diet; Schizophrenia

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