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PHILADELPHIA (CBS) — Philadelphia diners will see health warnings about sodium on restaurant menus next fall.

Mayor Jim Kenney signed a bill at City Hall on Friday requiring sodium warning labels on chain restaurant menus.

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The warnings would appear next to menu items that contain 2,300 milligrams of sodium or more. That’s the equivalent of about a teaspoon of salt.

Councilwoman Blondell Reynolds-Brown introduced the bill.

“Nutritional information does have value and when people have it on the front end, we actually do make different nutritional decisions,” said Reynolds-Brown.

Philadelphia has the highest rate of high blood pressure among the 10 largest U.S. cities.

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Public health officials say decreasing sodium consumption could save hundreds of deaths a year from heart attack and stroke.