SLC2A1 and pyruvate dehydrogenase deficiency: Since then, there have been smaller studies and case series or case reports looking at the diet’s role in individual epilepsy syndromes or diseases that could include an infantile presentation, such as: GLUT-1 deficiency syndrome, pyruvate dehydrogenase deficiency (PDHD), severe myoclonic epilepsy of infancy (Dravet syndrome), Rett syndrome, and selected mitochondrial disorders14–17.