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This is Scientific American 60-Second Science. I'm Sophie Bushwick. Got a minute?

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It's important to trust your gut.

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Because the stomach, and the food put into it, can influence the entire body.

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For example, a new study finds that mice that eat lots of fiber have stronger resistance against asthma-like attacks.

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For two weeks, lab mice ate one of three diets: low-fiber, or regular chow, or food supplemented with fiber-rich pectin.

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Then the mice were exposed to allergy-inducing dust mites.

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And the low-fiber rodents suffered from increased airway inflammation, while the high-fiber group experienced less of an asthmatic response.

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Seems that fiber supports gut bacteria that produce anti-inflammatory molecules called short chain fatty acids.

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These molecules then enter the bloodstream, where they can influence the immune system.

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An over-reactive immune system can play a role in allergies and asthma.

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But the fatty acids can calm down the immune reaction.

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The work is published in Nature Medicine.

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Directly injecting the mice with a short chain fatty acid had a similar anti-inflammatory effect.

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But mice probably prefer fiber to a series of shots and it still helps them breathe easy.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Sophie Bushwick.

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