Lactose intolerance

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Some people experience recurrent episodes of abdominal cramping and diarrhea. In many cases, such symptoms result from lactose intolerance, but patients are not able to offer a helpful history because they do not link ingestion of milk products with onset of gastric distress. The authors explain how children and adults lose the ability to absorb lactose as well as describe clinical symptoms of malabsorption, objective methods to diagnose it, and practical ways to avoid the symptoms.