One third of U.S. adults suffer from high blood pressure, and nearly 25% of cases are linked to sodium intake.

The New York City board of health has unanimously approved a measure which mandates that menu items containing more than the recommended daily sodium limit will be required to be accompanied by a warning label.

According to a report by NBC News, in an attempt to encourage consumers to make healthier choices, the city has designed an icon of a black triangle encompassing a white salt shaker which will act as a warning that the accompanying item contains more that 2,300 milligrams of sodium. New York City is the first to require such warning labels, and this new measure is accompanied by the banning of trans-fats in the city.

The No. 1 killer in the U.S. is heart disease, which is caused by high blood pressure, and consuming too much sodium, as 80% of adults in New York City do, can raise blood pressure.

One great concern for the FDA is that restaurants and food producers often mark food options, such as salads, as healthy choices, despite the high levels of sodium within the products. Therefore, new mandates have been set that prohibit food items with more than 400 milligrams of sodium per single serving, or 600 milligrams in a main dish, from being labeled as healthy options.