Patulin is a dangerous toxin produced by molds that grow on apples and peaches, posing serious health risks to consumers. Researchers isolated two yeast species from fruits that can effectively break down patulin into a less toxic compound called (E)-ascladiol. The yeasts work by using enzymes inside their cells to degrade the toxin, and this biological approach could be used to safely remove patulin from contaminated fruits and fruit products.