The long-awaited FDA regulation for labeling a product “gluten free,” released last summer, goes into effect on August 5, 2014. Before this, the defintion for "gluten free" was arbitrary unless a product carried a trustworthy third-party seal. And now, though the 20 parts per million (ppm) standard is welcome clarification for GF eaters and manufacturers, it’s also not quite as simple as it might first appear.

At Natural Products Expo West 2014, Cynthia Kupper, RD, executive director of the Gluten Intolerance Group, detailed some of the ruling’s nuances.