An investigation into stomach illness possibly linked to Lucky Charms is underway. The Food and Drug Administration said it's looking into a link between a stomach bug and Lucky Charms cereal after hundreds reported feeling sick after eating the cereal to I-was-poisoned-dot-com. Since the beginning of April, over a thousand people have posted to the site claiming they are having stomach problems linked to Lucky Charms. The website says this is the largest amount of reports a single product has ever received on the site.