New Obamacare rules require restaurant chains to post calorie counts for the foods on their menus. But a new study finds those postings don’t change consumer’s eating habits much.

New Yorkers who’ve been accustomed to seeing calorie counts on fast food menus for years haven't changed how often they eat high-calorie foods at popular restaurants, researchers report in Health Affairs, Fox News reports.

"There clearly is a subset of people who see and use this information," said senior author Brian Elbel, of NYU Langone and NYU Wagner Graduate School of Public Service in New York City.

But overall, the study found no difference in behaviors when they looked at the entire population of people visiting fast food restaurants.

Since 2008, New York City restaurants with more than 15 locations have been required to post calorie counts. A similar policy is to be implemented nationwide by December 2016, under the Affordable Care Act.

The new study findings are based on interviews with nearly 8,000 people who were dining in fast food restaurants in New York City and an examination of patrons' receipts from Burger King, KFC, McDonald's, and Wendy's.