The FOD Registry was created in order to build a comprehensive database of children and adults living with a fatty acid oxidation disorder (FOD) such as MCAD, LCHAD, VLCAD, SCAD, TFP, GA 2/MADD, CPT 1 & 2, CUD, CACT, HADH, HMG, MCKAT, 2,4-dienoyl-CoA reductase, and unclassified FODs. This database will be accessible to researchers from around the world interested in FODs.