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MONDAY, JANUARY 14, 2002

Is that rumble in your stomach caused by dairy products you ate? Or are your bowels just irritable?

A DNA test might clear the answer up. According to researched published today in Nature Genetics, scientists have identified the area in human genes that indicate whether one is lactose intolerant, or can't digest milk or milk products properly.

Most adults in the world are lactose intolerant because the gene affecting milk digestion shuts off after birth. Only in America, however, is the condition considered an issue.

Get the Story:
As Scientists Pinpoint the Genetic Reason for Lactose Intolerance, Unknowns Remain (The New York Times 1/12)
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Relevant Links:
Nature Genetics - http://www.nature.com/ng