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1 .This is Scientific American 60-Second Science. I'm Katherine Harmon.Got a minute?
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2 .Our bodies are home to trillions of other organisms that influence our health, and probably our weight.
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3 .Researchers found that mice given gut microbes from obese humans became fatter than those that got microbes carried by slim folks.
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4 .When the husky and lean mice shared microbes with each other, the bigger ones picked up some of the beneficial gut flora and had improved metabolisms.
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5 .But this shift only occurred if the mice were on a high-fiber, low-saturated fat diet.
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6 .If they were on a junk food diet, no improvement.
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7 .The findings are in the journal Science.
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8 .It's not clear how humans might remodel our microbial communities to change health or weight class.
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9 .The mice in the study were raised in germ-free environments and had no native microbiomes of their own.
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10 .In people, so-called fecal transplants have been reserved for more severe conditions than a bulging belly.
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11 .And probiotic products, such as yogurt, are minimally effective.
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12 .But flat or fat, what your belly looks like on the outside might have a lot to do with what's on the inside.
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13 .Thanks for the minute, for Scientific American 60-Second Science. I'm Katherine Harmon.
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