ACD is an international nonprofit organization dedicated to the three Cerebral Creatine Deficiency Syndromes (CCDS) which include AGAT Deficiency, GAMT Deficiency, and Creatine Transporter Deficiency (CTD). The mission of ACD is to provide patient, family, and public education, to advocate for early intervention through newborn screening, and to promote and fund medical research for treatments and cures for CCDS.