This is the final podcast in a three-part series on inborn errors of metabolism. Part 1 can be found here, and Part 2 here. This podcast reviews large molecule metabolic diseases including glycogen storage diseases, lysosomal and peroxisomal diseases and mucopolysaccharidoses. This episode was written by Dr. Dustin Jacobson, a 2nd year pediatrics resident from the University of Toronto and Dr. Jonathan Kronick, a staff physician in the division of clinical and metabolic genetics at the University of Toronto. After completing this series you can test your knowledge with a self-assessment quiz.