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1 .This is Scientific American 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
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2 .It's both painful and insulting to rub salt in a wound.
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3 .But a new study shows that salty skin can actually ward off infections, at least in mice fed a high-sodium diet.
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4 .That's according to a study in the journal Cell Metabolism.
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5 .We tend to think of dietary salt as a health threat.
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6 .And it is.
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7 .Too much sodium has been linked to high blood pressure and an increased risk for heart attack and stroke.
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8 .But we also crave salty snacks and store the accumulated sodium in our bodies, particularly in the skin.
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9 .A clue to explaining this paradox came when researchers noticed that mice that were attacked by a cage mate wound up with an unusually large amount of sodium at the site of the bite.
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10 .They then found high sodium levels in people at the locations of bacterial skin infections.
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11 .So the researchers fed mice a high-sodium diet.
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12 .And found that the dietary salt boosted the activity of immune cells in the animals' skin, which gave them a leg up when it came to healing their wounds.
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13 .The findings could lead to treatments that would help us assault infections without having to resort to pretzels, potato chips or pickles.
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14 .Thanks for the minute, for Scientific American 60-Second Science. I'm Karen Hopkin.
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