What is one common sign of food spoilage?

One common sign of food spoilage includes off odors or noticeable changes in color and texture. When food spoils, it undergoes various physical and chemical changes that affect its sensory characteristics. Off odors arise from the breakdown of food components and the growth of spoilage microorganisms, which produce substances that produce unpleasant smells. Additionally, changes in color can indicate that the food is no longer fresh; for example, vegetables may appear dull or browning, and meats may change to an unappealing hue. Likewise, changes in texture, such as sliminess on fish or mushiness in fruits and vegetables, often signal that the food has gone bad. Recognizing these signs is crucial for ensuring food safety and preventing foodborne illnesses.