Which characteristic indicates food is spoiled or unsafe to eat?

The characteristic that indicates food is spoiled or unsafe to eat is an off-color appearance. When food spoils, chemical changes occur that can alter its color. For instance, fresh fruits and vegetables should have vibrant colors, and meat should typically appear bright red or pink. If the color becomes dull, grey, or has unexpected discolorations such as green or black spots, it is often a sign of spoilage and potential bacterial growth.

Recognizing color changes is crucial because many pathogens that cause foodborne illnesses can thrive in spoiled food, which may not only look unappetizing but can also pose serious health risks. Thus, when assessing food safety, checking for an off-color appearance serves as a reliable visual cue that the food may no longer be safe to consume.