Idiopathic Ketotic Hypoglycemia is the most common non-iatrogenic cause of hypoglycemia in children beyond infancy. It improves with age and is rare after puberty. Early morning hypoglycemia, responding promptly to glucose, is a typical presentation. Etiology of hypoglycemia is unclear; deficiency of gluconeogenic substrate (hypoalaninemia) has been widely proposed. Idiopathic Ketotic Hypoglycemia is a diagnosis of exclusion. Rule out specific etiologies first. Ketonuria precedes hypoglycemia by several hours, testing for ketonuria helps in early detection. For prevention, avoiding fasting states and bedtime snacks are helpful.

Keywords: Ketotic hypoglycemia, children, hypoalaninemia