Diagnosing Lactose Intolerance

It can be difficult diagnosing lactose intolerance because there is no standard method of diagnosis. The most common methods to date are a hydrogen breath test, milk challenge test, and symptom history evaluation.

Hydrogen Breath Test

A physician can choose to use a hydrogen breath test to determine if an individual hNot being able to digest lactose, usually causes digestive discomfort, however in some cases, one can have lactose malabsorption and still not experience symptoms. Thus, lactose intolerance is the term used when an individual experiences symptoms from having lactose malabsorption. In most cases, a hydrogen breath test helps eliminate more serious diseases or conditions.

The hydrogen breath test involves drinking a mixture of lactose and water. If the lactose cannot be digested, hydrogen will be produced from bacteria in the patient's digestive system. The physician will measure hydrogen levels in the patient's breath over a four to six hour period.

Milk Challenge Test

A milk challenge test is a simple test that can be administered at home. Avoid all dairy products for 48 hours and the following morning drink 12 ounces of milk on an empty stomach. Over the next 6 hours, document and make note of any symptoms or discomfort. If you experience digestive symptoms of gas, cramps, bloating or diarrhea you may be lactose intolerant.

It is recommended that you check with your physician before administering a milk challenge test and after to discuss results.

Symptom History Evaluation

A third diagnosis option for individuals is a symptom history evaluation. This requires reviewing a symptom history with a physician or medical professional and determining if there is a relationship between lactose ingestion and the onset of symptoms. This method is the least accurate because there are a number of other possible digestive conditions that could be contributing to the gastrointestinal symptoms.