Dr. Dominic D'Agostino discusses the effectiveness of the ketogenic diet for patients with neurodegenerative disorders like Alzheimer's and Parkinson's disease. He explains that there are different subtypes of Alzheimer's disease and a metabolic intervention like a ketogenic diet may be a good approach for patients with a specific metabolic phenotype. He also shares a case report of a patient who saw improvement with the use of beta hydroxybutyrate ester as a therapy.