Lactose intolerance overview

Lactose Intolerance Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Lactose intolerance is the term used to describe a decline in the level of lactase, an enzyme needed for proper metabolization of lactose (a sugar that is a constituent of milk and other dairy products), in human beings.

Epidemiology and Demographics

An estimated 70% of adult humans are considered lactose intolerant, it is uncommon in healthy northern westerners and a few others groups.