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Lactose intolerance is a deficiency in the enzyme lactase. Lactase is the enzyme that digests the milk sugar lactose. People with a lactose intolerance typically experience an upset stomach, bloating, gas, and loose stools. These are also common symptoms of a dairy allergy.
Many patients complain of a lactose intolerance. They usually say that taking Lactaid or a digestive product designed for lactose intolerance will resolve their digestive problems. However, they obviously didn’t schedule an appointment just to tell me this and they are usually experiencing one of the other symptoms associated with a dairy allergy.
Not surprisingly, the lactose intolerance usually turns out to be a dairy allergy, which is an actual immune response to dairy. The dairy allergy has apparently damaged the digestive tract to the extent that it has caused a deficiency in the enzyme lactase, which is produced by the cells lining the digestive tract. Many people mistakenly believe that they can continue to eat dairy products as long as they take a digestive aid, or they avoid milk but still eat cheese, etc.
Unfortunately, most continue to suffer from their milk allergy even though their digestive symptoms have diminished.
If you have a lactose intolerance and experience any of the symptoms listed on page one then you should be tested for a dairy allergy via an ELISA blood test.
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Dr. Wangen is the founder and medical director of the IBS Treatment Center, the award winning author of two books, and a nationally recognized speaker on digestive disorders. He has been on ABC, NBC, and Fox as well as public radio, and was named one of Seattle’s Top Doctors by Seattle Magazine.