An abnormal sensitivity to lactose, the predominant sugar found in cow's milk, due to a deficiency in a digestive enzyme called lactase.
People with lactose intolerance can take lactase enzyme supplements to help their bodies digest lactose sugar.
By Victoria Groce, About.com
Updated: June 09, 2008
About.com Health's Disease and Condition content is reviewed by our Medical Review Board
An abnormal sensitivity to lactose, the predominant sugar found in cow's milk, due to a deficiency in a digestive enzyme called lactase.
People with lactose intolerance can take lactase enzyme supplements to help their bodies digest lactose sugar.
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