Ketogenic Diet and Schizophrenia: Clarifying RFK Jr.'s Claims

Psychiatric researchers have addressed claims made by Robert F. Kennedy Jr., regarding the ketogenic diet's role in treating schizophrenia. Kennedy Jr. stated that a Harvard doctor "cured schizophrenia using keto diets."

Dr. Christopher Palmer, the Harvard psychiatrist likely referenced, clarified that he has never used the word "cure" for any mental illness, including schizophrenia, but considers the ketogenic diet a powerful treatment that can induce remission of symptoms.

Kennedy Jr.'s statement, made during a tour promoting a "new food pyramid," diverged from typical ketogenic diet principles, which do not emphasize red meat as his own "carnivore diet" does.

The Evidence: Case Reports and Their Limitations

Evidence for the ketogenic diet's potential to help with schizophrenia symptom remission stems from two case reports published by Palmer in 2019.

Palmer noted that these were only two cases and that case reports do not prove efficacy due to lack of control and potential biases. However, he highlighted their value in generating hypotheses, especially given the rarity of schizophrenia symptom remission.

The case reports involved two women, aged 39 and 82, with long-term schizophrenia. Both adopted a ketogenic diet for other health reasons (gastrointestinal distress and weight loss) and subsequently observed improvements in their schizophrenia symptoms, leading them to discontinue their medications.

Palmer emphasized that stopping psychiatric medications should always be done under careful medical supervision. One patient in his reports worked with a doctor to taper off medication, while the other stopped abruptly on her own, resulting in severe psychosis and hospitalization before safely tapering medication while continuing the diet.

A History of Neurological Treatment and Growing Psychiatric Interest

The ketogenic diet has a history of use for neurological symptoms, emerging in the 1920s as a treatment for epilepsy in children. It experienced a resurgence in the 1990s for treatment-resistant epilepsy and is now gaining attention from psychiatric researchers.

Approximately 20 controlled trials are currently underway to investigate keto's efficacy for various psychiatric conditions, including schizophrenia and bipolar disorder. Researchers suggest the diet may help with both symptoms and side effects of conventional medications.

Exploring the Mechanisms: Mitochondria and Ketosis

Scientists are exploring the mechanisms behind the diet's potential benefits. Palmer suggests a link to mitochondrial function, as mitochondrial dysfunction is implicated in most psychiatric disorders.

Dr. Deanna Kelly, a psychiatry professor, explained that the ketogenic diet alters how mitochondria function by changing the body's primary fuel source from glucose to fat (ketosis).

Ongoing Research and Future Challenges

Dr. Daniel Smith, a professor of psychiatry at the University of Edinburgh, conducted a feasibility trial for keto in bipolar disorder patients. His research indicated a correlation between changes in brain glutamate levels and symptomatic improvement, though this evidence was not strong due to the small sample size. He is initiating a larger controlled study.

Despite growing interest and investment, questions remain about the long-term feasibility and adherence to a strict ketogenic diet.

Questions remain about the long-term feasibility and adherence to a strict ketogenic diet, which eliminates staple foods like rice and bread and can be costly. Research is ongoing into whether variations, such as "cheat days," are compatible with maintaining ketosis.

Palmer expressed satisfaction with the diet's prominence in discussion but voiced frustration over the politicization of his work.

Palmer... voiced frustration over the politicization of his work, advocating for progress through open scientific inquiry rather than polarized views.