Ketogenic Diet Shows Promise in Treating Psychotic Disorders

A recent randomized controlled trial indicates that a ketogenic diet may yield significant improvements in metabolic and psychological symptoms among individuals with psychotic disorders. However, the necessity for further investigation remains due to the limited duration of initial findings.

Study Overview and Design

Researchers from the University of California, San Francisco (UCSF) conducted this pioneering randomized controlled trial, published in Schizophrenia Bulletin, which focused on the effects of a ketogenic diet in patients diagnosed with schizophrenia-spectrum disorders or bipolar 1 disorder. Out of 58 participants, 47 completed the initial one-month open-label phase comparing the ketogenic diet to a diet-as-usual control. Following the initial phase, 25 participants voluntarily extended their dietary intervention for an additional four months in a single-arm structure.

Metabolic and Psychological Findings

The trial found that participants on the ketogenic diet exhibited notable metabolic enhancements within the first month. Specifically, those following the ketogenic regimen achieved higher ketone levels, which correlated with lowered blood glucose and decreased symptoms of depression, as measured by the Patient Health Questionnaire-9 (PHQ-9). Importantly, these outcomes were observed even after adjusting for weight loss, implying that ketosis itself may contribute to these health benefits.

During the four-month extension, participants sustained metabolic improvements while also experiencing significant reductions in depression and schizophrenia symptoms, alongside enhanced cognitive performance. Notably, 83% of individuals maintained ketosis during the initial month, with this figure rising to 94% in the extension phase, and no substantial side effects were reported.

The Need for Further Research

Despite promising results, the lead investigator, Judith M. Ford, Ph.D., emphasized the importance of larger and more comprehensive controlled trials to verify these findings. The current study suggests that a one-month intervention might be inadequate to fully assess the potential mental health benefits of a ketogenic diet, as the significant cognitive improvements observed at four months require validation in a controlled setting. This research aligns with recent pilot studies that have also shown positive responses in schizophrenia and bipolar disorder, advocating for the necessity of expanded randomized controlled trials to further explore the efficacy and safety of ketogenic therapy.

THE CNP TAKEAWAY

This study points to the ketogenic diet as a promising avenue for improving symptoms associated with serious mental illnesses. However, additional research is essential to confirm its long-term benefits and effectiveness.

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This article was prepared by The Center for Nutritional Psychology based on the new article entitled “Ketogenic Diet Shows Promise for Psychotic Disorders,” authored by Judith M. Ford, Ph.D. Read medicalxpress.com