By Pat Loeb

PHILADELPHIA (CBS) — Nutritionists have been warning for years about the salt in fast food. Now, a Philadelphia city councilwoman wants a warning on menus.

A bill introduced in council on Thursday would require chain restaurants to label high sodium items.

READ MORE: Woman Beaten To Death With Pipe Inside Old City Office Building, Police Say

It’s not at all rare for one fast food meal to have more than the full day’s recommended allowance of 2,300 milligrams of sodium.

Councilwoman Blondell Reynolds Brown believes one reason for that is that diners don’t know it.

“Knowledge is power and when they have it, research tells us, citizens actually make different nutritional decisions,” she said.

READ MORE: Suspect Arrested After Holding Teen Girl Hostage During Barricade In Overbrook, Police Say

The city’s existing menu labeling law includes calories and fat content, but Brown says sodium is a health concern, too.

“All of the science tells us that sodium is simply bad for you when it comes to your health and high blood pressure,” said Brown.

Brown says during hearings on the bill, council will study the results in New York, which two years ago began requiring little salt shaker icons next to items with over 2,300 milligrams of salt.

MORE NEWS: PennDOT Dealing With Twin Challenges As Latest Winter Storm Bears Down On Philadelphia Region

Penn researchers say a stop sign with the words “sodium warning,” would be more effective.