Leftovers can be kept for three to four days in the refrigerator. Be sure to eat them within that time. After that, the risk of food poisoning increases.If you don't think you'll be able to eat leftovers within four days, freeze them immediately.Food poisoning â also called foodborne illness â is caused by harmful organisms, such as bacteria in contaminated food.hen you're ready to eat leftovers, reheat them on the stove, in the oven or in the microwave until the internal temperature reaches 165 F (74 C). Because they may not get hot enough, slow cookers and chafing dishes aren't recommended for reheating leftovers.
Written By: Carcinogen, any of a number of agents that can cause cancer in humans. They can be divided into three major categories: chemical carcinogens (including those from biological sources), physical carcinogens, and oncogenic (cancer-causing) viruses. 1  Most carcinogens, singly or in combination, produce cancer by interacting with DNA in cells and thereby interfering with normal cellular function.
Noun. 1. carcinogen-any substance that produces cancer. substance-a particular kind or species of matter with uniform properties; shigella is one of the most toxic substances known to man.