Mexico put warning labels on dairy products that have artificial sweeteners, and as a result, companies started using way fewer of those sweeteners—down by almost a third. Meanwhile, Chile and Peru didn’t warn about sweeteners, and they actually started using more. So, it looks like warning people about artificial sweeteners might push companies to stop putting them in food.

After Mexico put warning labels on sugary drinks, companies changed their recipes to make the drinks just under the sugar and calorie limits—so they wouldn’t get the scary label—and this happened mostly to drinks that were barely over the limit before.

After Mexico started putting warning labels on unhealthy foods, many companies changed their recipes to make their products healthier—so they wouldn’t have to put the scary labels on them anymore.

After Mexico started putting warning labels on unhealthy snacks and dairy products, people bought fewer of the ones with too much saturated fat—like cheese and chips—because the labels helped them make better choices.

After Peru started putting warning labels on unhealthy foods, fewer of the most popular foods ended up with those labels—especially ones saying they’re high in sugar or have bad fats, because companies changed their recipes to avoid the warnings.

After Peru started putting warning labels on super-sweet drinks, companies changed their recipes to use less sugar and more artificial sweeteners, so fewer drinks now need the warning label.