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.

USDA Fact Sheet: Molds On Food: Are They Dangerous? Be sure to check out the chart on what to do with food with mold on it. For most things? throw it out!