Sodium-Dependent Multivitamin Transporter Deficiency, also known as neurodegeneration, infantile-onset, biotin-responsive, is related to metabolic acidosis and inherited metabolic disorder. An important gene associated with Sodium-Dependent Multivitamin Transporter Deficiency is SLC5A6 (Solute Carrier Family 5 Member 6). Affiliated tissues include brain and pons, and related phenotypes are nystagmus and global developmental delay