When the US Food and Drug Administration unveiled its final changes to the iconic Nutrition Facts label last week, the agency made a bold move to provide American shoppers with more nutrition information—more, probably, than any consumers in the world.

The biggest change? A sugar-toothed food industry will have to do something it has railed against: Tell people just how much of the sweet stuff it tucks into products.

Among other changes, the FDA will require that calorie totals appear in large, bold type, that serving sizes be based on what Americans typically eat, and—most provocatively—that each label contain a line indicating how much sugar was added in processing. Especially important is the agency’s requirement that added sugars be listed in