How long can most leftovers be safely stored in the refrigerator?

Most leftovers can be safely stored in the refrigerator for 3-4 days due to the growth of bacteria that can occur at temperatures above 40°F (4°C). During this timeframe, the risk of foodborne illness is minimized if the leftovers are handled and stored properly. The United States Department of Agriculture (USDA) recommends consuming or freezing leftovers within this period to ensure food safety and maintain quality.

After 4 days, the risk increases as microbes continue to multiply, potentially leading to spoilage or foodborne illnesses. Foods may begin to show signs of spoilage like off smells, change in texture, or discoloration, indicating that they are no longer safe to consume.

Storing leftovers beyond this timeframe is not advisable, as the risk for harmful bacteria to grow and cause food poisoning increases significantly. Therefore, sticking to the 3-4 day guideline is crucial for safe food handling and consumption.