Spoiled food refers to items that have deteriorated in quality and are no longer safe to eat. This can happen due to the growth of bacteria, mold, or yeast, which thrive in certain conditions, such as warmth and moisture. Signs of spoiled food include unpleasant odors, changes in color, and a slimy texture. Common examples of spoiled food include dairy products like milk and cheese, as well as fruits and vegetables. Consuming spoiled food can lead to foodborne illnesses, which may cause symptoms like nausea, vomiting, and diarrhea. Proper storage and handling can help prevent food spoilage.