 The ketogenic diet, KD, is a high fat, low carbohydrate and moderate protein diet that has shown benefit as a treatment in neurologic disorders and may serve as a therapeutic option in individuals with psychiatric disorders. A review of 14 studies found that the KD was beneficial in reducing symptoms associated with various psychiatric disorders, but more data is needed to clearly define the specific benefits. This article was authored by Erica Aetillary, PharmD, KDD Ellis, PharmD, Tiffany B. Threat, PharmD, and others.