What is the recommended time frame for refrigerating perishable leftovers?

Perishable leftovers should be refrigerated within 2 hours to prevent the growth of harmful bacteria. This time frame is crucial because bacteria can multiply rapidly at room temperature, potentially leading to foodborne illnesses. When food is left out for more than 2 hours, it can enter the "danger zone" (between 40°F to 140°F) where bacteria thrive. By refrigerating leftovers promptly, you ensure food safety and maintain the quality of the food. This guideline is supported by food safety authorities, emphasizing the importance of acting within this time frame to enhance health and prevent waste.