Long-chain fatty acid oxidation disorders (LC-FAODs) are rare, inherited conditions. With an LC-FAOD, the body has trouble breaking down fat for energy, which can lead to symptoms such as low blood sugars, muscle pain/weakness, and heart problems. LC-FAODs are diagnosed by newborn screening or symptoms later in life. Management includes a specialized nutrition plan, and prevention of fasting, especially during illness. A person with an LC-FAOD can live a full, active and healthy life with lifestyle changes and close coordination with, and support from, an expert healthcare team. Table of Contents: ‧ Fats and fatty acids ‧ Fatty acids for energy ‧ Long-chain fatty acid oxidation disorders ‧ Diagnosis ‧ Genetic testing ‧ Living with an LC-FAOD ‧ Monitoring ‧ What can I do to help my child? ‧ Genetic counseling ‧ How many people are affected? ‧ Who’s who?