Stephen J. Schueler, M.D.

Overview Incidence Symptoms Evaluation Treatment infants questions for doctor specialist Home Care diarrhea warning signs Outlook Complications Underlying Cause Anatomy

Milk Allergy Underlying Cause

Lactose is a sugar found in dairy products. Lactase is an enzyme in the intestine that breaks down lactose into glucose and galactose, which can be absorbed into the bloodstream. Lactose intolerance is caused by the absence of lactase in the intestine. Lactose collects in the intestine, absorbs water, and causes diarrhea.

Lactose intolerance may be caused by:

Illnesses that may cause lactose intolerance include:

Continue to Milk Allergy Anatomy

Last Updated: Feb 4, 2011 References
Authors: Stephen J. Schueler, MD; John H. Beckett, MD; D. Scott Gettings, MD
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PubMed Milk Allergy References
  1. Lovelace HY, Barr SI. Diagnosis, symptoms, and calcium intakes of individuals with self-reported lactose intolerance. J Am Coll Nutr. 2005 Feb;24(1):51-7. [15670985]
  2. Suarez FL, Savaiano DA, Levitt MD. Review article: the treatment of lactose intolerance. Aliment Pharmacol Ther. 1995 Dec;9(6):589-97. [8824645]
  3. Swagerty DL Jr, Walling AD, Klein RM. Lactose intolerance. Am Fam Physician. 2002 May 1;65(9):1845-50. [12018807]
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