If you knew that, the burrito with sour cream and guacamole you've been craving so badly had more than half the calories you should eat in a whole day, would you still eat it or pass it?

New York City Health Department has decided to expand its healthy-eating campaign with subway ads that say most adults should limit themselves to 2,000 calories day. They believe that people might eat less if they knew what their limit should be.

New posters appeared in about 1,000 subway cars providing calorie counts for several menu items, 470 for a giant apple bran muffin or 1,170 for a chicken burrito with toppings. The ads were placed in 20 % of city subway cars.

The new campaign is intended to build on the city's new regulation requiring chain restaurants to post calorie counts on their menus. The rule applies to chain restaurants that have 15 or more locations nationwide.

The average is 2,000-calorie figure but Federal Centers for Disease Control and Prevention recommendations vary by age, gender and level of activity. They say that men can consume more calories than women without gaining weight, and youngsters more than seniors.

What's important is that this New York City's calorie-count regulation has paved the way for similar laws elsewhere. The next was California that obliged chain restaurants to reveal how many calories there are in their standard menu items.