Chain restaurants across New York City began placing salt-content warnings signs on menu items with over 2,300 milligrams of sodium on Tuesday, as part of a new regulation passed last September.
The regulation has sparked a vigorous debate, with those against it saying it's not only an intrusion of government, but it also doesn't work. Those in favor, however, argue that the public has a right to know how much salt, or how many calories, are in their food.
"The policymakers who want more warning labels, calorie counts on menus, all have good intentions. The question is: 'Is science driving the policy?' " Jeff Stier, head of risk analysis division at the National Center for Public Policy, told CNBC's "Power Lunch."