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1 .This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?
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2 .Internet herb stores claim that swallowing oregano oil can cure your cold or flu.
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3 .But the devil's in the details.
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4 .Oregano oil is an antimicrobial, and can even kill off that tough cruise ship plague, norovirus,
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5 .but there's no evidence it can do so inside your body, scientists say.
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6 .It works to inactivate pathogens before they get inside.
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7 .Researchers experimented on the mouse form of norovirus, genetically similar to the hard-to-grow human strain.
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8 .They treated virus colonies with solutions of either four percent oregano oil, or half a percent carvacrol, the active ingredient.
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9 .Turns out oregano oil cut virus numbers by 10-fold.
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10 .Carvacrol: 10,000-fold.
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11 .In comparison, bleach achieves a million-fold reduction.
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12 .The results appear in the Journal of Applied Microbiology.
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13 .So, oregano oil's nowhere near as effective as bleach.
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14 .But it's nontoxic, and has no noxious fumes.
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15 .Unless you hate the smell of oregano.
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16 .So study author Kelly Bright of the University of Arizona says it could be useful in food-safety settings:
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17 ."You could maybe reduce the amount of bleach you're using by throwing in some carvacrol or essential oil."
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18 .Just don't expect it to cure you, once you've got the bug.
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19 .Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.
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