In August 2013, the U.S. Food and Drug Administration (FDA) issued a final rule on “gluten-free” food labeling. After the final compliance date of August 5, 2014, FDA measured the gluten level of more than 250 different products labeled “gluten-free.”

More than 99.5% of the food products labeled “gluten-free” that FDA tested were in compliance with the requirement that such foods have less than 20 ppm (parts per million) of gluten. In total, FDA collected and analyzed 702 samples from more than 250 products labeled “gluten free.” The products were collected between July 2015 to August 2016.

Only five samples from one of the products labeled “gluten-free” did not comply with the less than 20 ppm requirement. That product was recalled and subsequent sampling by FDA did not find levels of gluten that violated the regulation.

Products tested were from three commodity groups: cereals, grain bars and flours. Results of the surveillance sampling can be accessed from FDA’s website.