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ek slash special offer. This is Scientific Americans 60 Second Science I'm

Christopher Intagyatta.

Immigrants to the U.S. might lose touch with certain customs and traditions back home.

But here's something else they lose. They're microbes.

When they came to the U.S. almost immediately they began losing their native microbes.

Dan Knights, a computational biologist at the University of Minnesota.

And over time, the balance shifted to the point where they were dominated by the U.S. associated

microbes.

He's referring to first and second generation immigrant women from the Hmong and Korean ethnic minorities in

Southeast Asia. His team sequenced the DNA found in their feces and they saw

that there was an immediate decline in the number and diversity of gut microbes among the immigrants

compared to their counterparts still living back home and the decline continued over time.

Now if you're thinking well maybe the women just switched up their diets started eating more

...