What is a key sign of food spoilage?

A key sign of food spoilage is the presence of off odors, color changes, or the growth of mold. These indicators suggest that the food has undergone biochemical changes, which can be caused by the growth of bacteria, yeasts, or molds.

When food spoils, it often develops unpleasant smells due to the production of gases and compounds from microbial activity. Additionally, spoilage can lead to visible changes in color, such as browning or dullness, which is a sign that the food is no longer safe to consume. Mold is a clear indicator of spoilage, as it signifies the presence of fungal growth, which can pose health risks if ingested.

In contrast, bright colors and strong flavors are typically associated with fresh food, and cold textures along with low moisture levels can indicate proper storage conditions rather than spoilage. Increased shelf life and perceived freshness might suggest that food is still good to consume, but these factors do not adequately indicate spoilage. Understanding these signs is crucial for ensuring food safety and preventing foodborne illnesses.