Does gluten-free certification guarantee that a product is gluten-free?
The mark assures that the product contains less than 10-ppm gluten (5-ppm gliadin) and similar proteins from rye and barley as measured by using testing methods that are accepted for gluten testing by analytical associations such as the Association of Analytical Communities (AOAC), testing researchers and other such agencies. No testing method is available that measures to zero.
