have mandatory testing for MCAD in all states for newborn children.

In the United States, the estimated incidence of MCAD deficiency is 1 in 17,000 people. The condition is more common among individuals of northern European ancestry. Medium-chain acyl-CoA dehydrogenase (MCAD) deficiency is a condition that prevents the body from converting certain fats to energy, particularly during periods without food (fasting).Signs and symptoms of MCAD deficiency typically appear during infancy or early childhood and can include vomiting, lack of energy (lethargy), and low blood sugar (hypoglycemia). In rare cases, symptoms of this disorder first appear during adulthood. People with MCAD deficiency are at risk for serious complications such as seizures, breathing difficulties, liver problems, brain damage, coma, and sudden death.