What physical condition of food indicates that it should not be consumed?

Unusual coloring or odor is a key indicator that food may be unsafe for consumption. These physical changes often suggest that the food has undergone spoilage or contamination. For instance, if meat appears an unusual color compared to its typical hue, this could indicate that it has started to break down or might have been improperly stored. Similarly, an off-putting odor could mean the presence of bacteria or other pathogens that can cause foodborne illnesses. It’s essential to rely on sensory cues like sight and smell to evaluate the condition of food, as these can provide immediate signs of potential hazards.

While packaging with a prior date can be a concern, not all foods are immediately deemed unsafe past their expiration or "best by" dates, especially if stored correctly. A soft texture in some food items may not always indicate spoilage; for certain products, it could be a normal characteristic. Lastly, the presence of ice crystals might suggest that a food item has been thawed and refrozen, which could compromise quality or safety but isn't as definitive a sign of spoilage as unusual coloration or odor.