If not, you may need an alternate non-milk formula. Your own observation of symptoms. Medical history and physical exam by a doctor. Laboratory studies, such as a stool exam and lactose-tolerance test. However, symptoms can be relieved or controlled with a diet free of milk and milk products.
Symptoms worsen at times for unexplained reasons.
A supplement to neutralize lactose in milk. The enzyme lactase is available without a prescription to be added to milk and milk products and products are available that have the enzyme added already. Calcium supplements may be recommended. If the condition is present at birth, an infant formula that contains little or no lactose, such as a soybean-based formula, will be recommended. If the lactose intolerance is temporary and caused by gastroenteritis, the substitute formula should be necessary for a short time only.