This text presents a compilation of topics that have been taught at Metabolic University (MU), an interactive, didactic educational program that has trained over 600 metabolic dietitians/nutritionists, physicians, nurses and genetic counselors.  This book was created in 2014 for the metabolic community. The 1st edition contains only subject matter covered at Metabolic University; therefore, it is not a comprehensive treatise on Inherited Metabolic Disorders (IMD) but rather a text on the most frequently encountered challenges in IMD nutrition.  Each chapter in the book highlights principles of nutrition management, how to initiate a diet, and biomarkers to monitor the diet.