Some molds cause allergic reactions and respiratory problems. And a few molds,
in the right conditions, produce "mycotoxins," poisonous substances that can
make people sick. When you see mold on food, is it safe to cut off the moldy
part and use the rest? To find the answer to that question, delve beneath the
surface of food to where molds take root.
States Department of Agriculture
Food Saftey and Inspection Service