NEW YORK — As warning labels go, the small salt shaker emblems that began showing up on some New York City restaurant menus recently are fairly unobtrusive, but each is supposed to carry a powerful message. If the black and white logo appears next to a dish, it means it contains more salt, by itself, than doctors recommend that a person ingest in an entire day.

Getting diners to pay attention to the logos, though, is another matter.

“I haven’t had health problems, other than I’m a little overweight, so I feel I should eat what I want until I have a problem,” said Madi Boggs, a former resident of New York who now lives in Connecticut, as she tucked into a plate of crispy chicken fingers at a TGI Friday’s in Manhattan.

The city began requiring chain restaurants to post the warnings in December. Hundreds have voluntarily complied, even as the industry has continued to delay enforcement of the rules through a court challenge.

But customers interviewed Tuesday at several city restaurants said the labels were unlikely to change what they ordered.

The regulation applies to restaurants and fast-food places with more than 15 outlets nationwide. It requires eateries to post the salt shaker emblem next to menu items that contain more than the daily recommended limit of 2,300 milligrams of salt. Experts say too much salt can lead to high blood pressure.