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What is lactose intolerance?

Lactose is a natural sugar found most commonly in cow's milk. Lactose intolerance occurs when your body cannot properly digest lactose. This happens to people when they do not have enough of the enzyme lactase, which breaks down lactose into its easily digested components, glucose and galactose. Lactose intolerance can result in stomach pain, increased flatulence and sometimes diarrhea.

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About this article

Author: Karen McCloskey BHSc
First answered: 23 Sep 2014
Last reviewed: 19 May 2018
Rating: 4.0 out of 5
Votes: 255 (Click smiley face below to rate)
Category: Coeliac disease

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