• Corpus ID: 31343794

Lactose intolerance.

  title={Lactose intolerance.},
  author={Daniel Swagerty and Anne Walling and Robert M. Klein},
  journal={American family physician},
  volume={65 9},
Persons with lactose intolerance are unable to digest significant amounts of lactose because of a genetically inadequate amount of the enzyme lactase. Common symptoms include abdominal pain and bloating, excessive flatus, and watery stool following the ingestion of foods containing lactose. Lactase deficiency is present in up to 15 percent of persons of northern European descent, up to 80 percent of blacks and Latinos, and up to 100 percent of American Indians and Asians. A sizable number of… 

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