If heat kills bacteria, why does cooking and eating expired food still make you sick

Question

Surely the bacteria that grew after the expiration date will have been killed in the cooking process?

In: 15

Answer 1

Oftentimes, food poisoning is caused because you eat a germ and the germ then grows inside you and make you sick. Killing bacteria by cooking stops this kind of food poisoning by stopping the germ from growing.

Othertimes, food poisoning is caused because there is a chemical in the food that is poisonous. Some germs create these poisons as they grow, and sometimes old food just chemically breaks down. Most cooking is not powerful enough to destroy most poisons (especially if you want to eat food instead of burnt charcoal), so cooking doesn’t prevent this kind of food poisoning.