The U.S. Food and Drug Administration closed its investigation into Lucky Charms this week after finding no link between the General Mills cereal and hundreds of self-reported illnesses.
"The FDA investigation has closed with no pathogen or cause of the self-reported illnesses identified, despite extensive testing for numerous potential microbial and chemical adulterants," the agency announced Wednesday.
Earlier this year, reports of gastrointestinal distress linked to the cereal started showing up on a consumer website dedicated to foodborne illness. The FDA received 558 illness reports and launched its investigation in April, which included factory visits and sample collections.