What is a common sign of food spoilage?

Foul odors and visible mold are clear indicators of food spoilage. When food spoils, it undergoes various physical and chemical changes due to the action of bacteria, yeast, and mold. These microorganisms produce by-products that can result in unpleasant smells, which serve as a warning that the food is no longer safe to consume. Additionally, the presence of mold is a visible sign that deterioration has occurred, often indicating that the food should be discarded to prevent foodborne illness. Recognizing these signs is crucial for ensuring food safety and maintaining public health standards in food handling environments.