Last month, Coca-Cola began an advertising campaign for new versions of Sprite and Fanta that boasts the tagline “Free of Logos, Equally Rich” — a nod to the fact that they will no longer contain warning labels because the company replaced half the sugar with artificial sweetener.

Ben Sheidler, a spokesman for Coca-Cola, said the company had created 32 new beverages in the last 18 months, and that 65 percent of its drinks portfolio in Chile could now be described as having low or reduced sugar.

A spokesman for PepsiCo said two-thirds of its beverage brands in Chile also qualified as low or sugar-free and that more than 90 percent of its snack offerings were now low in both sodium and saturated fat.

Other companies have embraced the logo system as a way to tout healthy offerings. Soprole, a Chilean dairy company, produced a commercial that features child newscasters explaining the label system in a way their peers can understand.

“Originally we didn’t believe the logos would make much of a difference but in focus groups, we’ve discovered that kids really do look at them,” said Dr. Camila Corvalan, of the University of Chile who has been assessing the impact of new label system. “They’ll say ‘Mom, this has so many logos. I can’t bring them to school. My teacher won’t allow it.”

Soon after the labels began appearing, AB Chile, the industry association, released an online ad using Chilean celebrities to attack the new regulations. In one scene, a well-known television presenter propped up in his putative sick bed considers a tray of soup, crackers and marmalade — items he said the new law has deemed unhealthy. “This is what my mom gave me all my life and I can no longer eat it?” he asks indignantly. In another, an actress pulls a mound of mints from her pocketbook. “It’s obvious that they are high in sugar,” she says. “But I only eat two or three.”