A lot of people think they have food allergies, but they're likely wrong.
That's partly because it's easy to confuse common food-related problems like lactose intolerance or celiac disease with an allergy. But it's also because there are a lot of tests promoted for food allergies that don't measure up.
If you're trying to determine whether the ground chuck you buy in the grocery store contains so-called pink slime, or lean beef trimmings, you won't find it on the ingredient list. "It's not required to be labeled," explains Don Schaffner, a food scientist at Rutgers University.