Could we eat expired food after cooking it above 100°C ?

FORGET EXPIRY DATES ON FOOD. If food has bacteria ON it or IN it, regardless of any “date” shown, yes, cooking at 100C will kill off the “vegetative” cells (the ones actively growing and feeding). But you don't need to reach 100C. read more

Food that has gone bad can have elevated levels of these toxins, and no amount of cooking is going to make it safe to eat. I also wanted to add that the expiration date on food is nothing magical. It is not as if food suddenly goes from good to bad just because it has reached a certain age. read more

Because the heat during cooking either boils the water inside a bacteria until it bursts, dehydrates it, or (most probably) the heat denatures the enzymes and protein that are in the bacteria so that the bacteria can’t carry out metabolism (such as fermentation, respiration, deliver wastes out of the cell, deliver food into the cell, and other chemical and physical reactions). read more

While in many cases, expiry dates are important indicators of how safe the food is to consume, but with some foods it's more of a guideline. Here are some foods that are likely good to eat past the expiration date. read more