Requiring nutritional information on chain restaurant menus, as part of the bill, will likely have a larger impact than public reports, Liebman says.
"People need the calories right in front of them when they order" if there's going to be a change in buying behavior, she says.
But while labeling may have some positive effect, many diet experts worried that this alone would only reach those who are already health-conscious -- and people who aren't concerned about their health will not be slowed down by high caloric totals.
"Solutions to the obesity epidemic are going to be far more painful than just educating people on calorie content," Roslin says. It's going to take "social engineering," so that people pay attention to physical fitness after high school, and healthy foods are not the most expensive ones on a fast-food menu.
At the end of the day, "we can only hope that knowledge is power," Katz says, but knowledge certainly has to go beyond how many calories are in a food or which colossus dishes are a no-no.
It's going to take "a major societal shift," he says. "Calories per dollar should not be considered a measure of value. Nutrients per dollar…[should be the] right measure of food value in the modern world."