The U.S. Food and Drug Administration rules requiring restaurants and grocery stores to put calorie counts on their menus have come into effect this month. These new regulations are aimed at restaurants with 20 or more locations.
In the video above, CBS News asks a public health professor whether or not displaying calorie information actually affects what consumers order and interviews restaurant patrons to get their opinions.
Related: The question of healthful
This video does not necessarily reflect the opinions of the editors or management of Nation's Restaurant News.