Lactose intolerance

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Digestive system organs

Lactase deficiency; Milk intolerance; Disaccharidase deficiency; Dairy product intolerance

• Abdominal cramps
• Bloating
• Flatulence
• Weight loss
• Malnutrition
• Slow growth
• Abdominal distention
• Diarrhea
• Floating stools
• Foul-smelling stools

Symptoms often follow eating or drinking milk products, and are often relieved by withdrawal of milk products. Large doses of milk products may cause worse symptoms.

• Test for stool-reducing substances
• Lactose tolerance test
• Lactose-hydrogen breath test
• Small bowel biopsy

Review Date: 10/13/2006
Reviewed By: Jenifer K. Lehrer, MD, Department of Gastroenterology, Frankford-Torresdale Hospital, Jefferson Health System, Philadelphia, PA. Review provided by VeriMed Healthcare Network.