When a class action lawsuit accused David protein bars of containing 400% more fat and 80% more calories than advertised, the internet erupted. Comparisons to Mean Girls’ Regina George – who gained weight eating “healthy” bars – went viral. The case was dismissed this week, but it cracked open a little-known truth about how food labels really work.
The 20% Loophole
According to U.S. FDA regulations, packaged food labels can legally be off by up to 20% for calories, fat, added sugar, carbs, and fiber. That means a bar labeled 200 calories could deliver 240. Nutrients like protein and vitamins can be 20% lower than stated.
The FDA doesn’t pre-approve labels. Manufacturers self-report based on lab analyses or database estimates – both of which vary by batch, processing method, and ingredient source.
“Those labels are giving you a big picture snapshot,” says registered dietitian Jessica Cording. “The nutrient information is a ballpark number.”
When the Margin Matters
For most people who eat mostly whole foods, a single 20% deviation won’t derail health. But if your day is built around bars, shakes, and prepared meals, those gaps compound.
“A full day built on bars, snacks, and prepared meals can compound into a meaningful gap, especially for calories and added sugars,” explains Scott Keatley, RD.
The variation becomes critical for anyone closely managing intake – whether for fat loss, diabetes control, or medical nutrition therapy. Keatley adds that some products may also contain fewer calories than stated, but consumers have no way to know which is which.
Smart Takeaways for Busy Lifestyles
You can’t verify a label at the checkout counter. But experts suggest treating all packaged food numbers as estimates, not gospel. Assume a 10–15% margin of error for anything in a wrapper.
For office workers relying on protein bars for lunch, dietitians recommend shifting toward minimally processed foods most of the time – while accepting that packaged options are fine for convenience, not precision.
“Focus on consistent eating patterns and overall diet quality,” Keatley says. “If precision matters, assume a small margin rather than relying on exact numbers.”
Your nutrition label isn’t a lie – but it’s not a legal promise either. Read it as a guide, not a contract.