In infants with one of several disorders (eg, ketotic hypoglycemia, glycogen-storage disorder, free fatty acid metabolism defect, mild hyperinsulinism), hypoglycemia can be prevented with frequent feedings involving a specifically designed diet and a rapid response with parenteral dextrose when feeding is inadequate because of GI problems or other illnesses. Fructose must be avoided in children with fructose diphosphatase deficiency.