Patulin is a mycotoxin that is produced by certain species of Penicillium, Aspergillus, and Byssochylamys molds (mold) that may grow on a variety of foods including fruit, grains and cheese. Patulin has been found to occur in a number of foods including apple juice, apples and pears with brown rot , flour , and malt feed. However, given the nature of the food, the manufacturing processes, or consumption practices for many foods, patulin does not appear to pose a safety concern, with the exception of apple juice.