Bread molds thrive on bread because of the rich organic materials found in it. Sugar and carbohydrates fuel the growth of mold spores. This is why bread left out in the open begins to grow visible mold in only five to seven days.

How can you tell if bread is moldy?

If the surface of bread is altered by small white spots, light green or yellow furry sections or even dark or blackened areas, it's best to throw the bread out rather than to risk getting sick. This is one of the most important ways to identify bread that may be contaminated by mold.

Is it OK to eat bread with a little bit of mold?

You shouldn't eat mold on bread or from a loaf with visible spots. The mold roots can quickly spread through bread, though you can't see them. Eating moldy bread could make you sick, and inhaling spores may trigger breathing problems if you have a mold allergy. Try freezing bread to prevent mold.