Kellogg spokeswoman J. Adaire Putnam said about 20 people have complained, including five who reported nausea and vomiting. The company said the potential for serious health problems associated with the cereal is low.
Putnam said the lining of the cereals' boxes produced the off flavor and odor. Kellogg is trying to identify the substance on the liner that's causing the problem.
The products were distributed throughout the U.S. and began arriving in stores in late March.
Kellogg's shares were unchanged in midday trading.
Consumers concerned about the recall - or seeking a refund - can contact the Kellogg Consumer Response Center at 888-801-4163 from 8 a.m. to 8 p.m. Eastern time.