SLC2A1 and Dravet syndrome: The ketogenic diet (KD) is a normo-caloric, high-fat, adequate-protein, and low-carbohydrate dietary treatment that, according to recent international guidelines, is recommended for children and adults with drug-refractory epilepsy and two rare neurometabolic disorders: glucose transporter 1 deficiency syndrome (GLUT1-DS) and pyruvate dehydrogenase (PDH) deficiency [1,2,3].