Lactose Intolerance (cont.)
Bhupinder Anand, MD
In this Article
A milk challenge is a simpler way of diagnosing lactose intolerance than an elimination diet. A person fasts overnight and then drinks a glass of milk in the morning. Nothing further is eaten or drunk for 3-5 hours. If a person is lactose intolerant, the milk should produce symptoms within several hours of ingestion. If there are no symptoms or symptoms are substantially milder than the usual symptoms, it is unlikely that lactose intolerance is the cause of the symptoms. It is important that the milk that is used is fat-free in order to eliminate the possibility that fat in the milk is the cause of symptoms. It is not possible to eliminate the possibility that symptoms are due to milk allergy, a very different condition than lactose intolerance; however, this usually is not confusing since allergy to milk is rare and primarily occurs in infants and young children. (If milk allergy is a consideration, pure lactose can be used instead of milk.)
An important issue is the amount of milk required for the milk challenge.
Recognition of this issue is important in interpreting the results of a milk challenge.
Medically Reviewed by a Doctor on 2/3/2015
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Lactose Intolerance - Symptoms Question: The symptoms of lactose intolerance can vary greatly from patient to patient. What were your symptoms at the onset of your disease?
Lactose Intolerance - Causes Question: When did you develop lactose intolerance?
Lactose Intolerance - Diet Question: What's it like to try the elimination diet? What were the results?