General Mills is recalling nearly two million boxes of Cheerios because the cereal was labeled gluten-free but actually contains wheat.
The Minnesota-based company announced the voluntary recall Monday. It affects regular Cheerios and Honey Nut Cheerios that were produced at its Lodi, California facility during two weeks in July.
"An isolated incident resulted in wheat flour being inadvertently introduced into the gluten-free oat flour system," the company said. "As a result, the products may contain an undeclared allergen – wheat – in products labeled as gluten-free."
The recall affects an estimated 150,000 cases, or 1.8 million boxes of cereal from the Lodi plant – that amounts to four days of production of original Cheerios and 13 days of production of Honey Nut Cheerios, according to CNBC.
Products containing wheat can cause illness or severe reactions for people who have wheat allergies or celiac disease. Products containing wheat can also cause illness or discomfort for individuals with gluten intolerance.
The company said it will remove the affected boxes from warehouses and store shelves.
Consumers can check to see if they've purchased any of the recalled cereal boxes by looking for the "Better if used by" date, and the LD plant code, which indicates the cereal came from the Lodi plant. This tweet from the company shows where to check for that information.
Consumers can contact General Mills at 1-800-775-8370 to get a replacement or full refund.
No other Cheerios varieties or General Mills cereals are affected by the recall.
General Mills announced earlier this year that all five of its Cheerios varieties were transitioning to gluten free.