As glucose is the primary energy source for neuronal cells, any condition that lends itself to creating GLUT3 deficiency, as in the case of dietary restrictions, hypoxic–ischemia or significant hypoglycemia, can result in a panoply of neurodevelopmental disorders such as dyslexia, autism spectrum disorder (ASD), epilepsy, and attention-deficit/hyperactivity disorder (ADHD) [6,7,8,9,10]. The gene discussed is SLC2A3; the disease is autism spectrum disorder.