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.
A carcinogen is an agent that induces neoplasia, i.e. cancer. Whatâs an agent? Chemicals, radiation, and viruses are among the agents implicated in causing cancer. A mutagen is a chemical that can cause changes (mutations) to the genetic material of a cell (DNA). A mutagen is one possible pathway to carcinogenesis. When mutations occur in germ cells (i.e. sperm or ova) it is possible for the mutation to be transmitted to offspring. A mutagen may be a carcinogen, but the link is not absolute. That is, not all chemicals shown to be mutagens are necessarily carcinogens. Conversely, not all carcinogens are mutagens. There are nongenotoxic carcinogensâchemicals that cause cancer by several mechanisms including by inducing sustained cell injury. Another important idea.