Whether broccoli can be eaten overnight needs to be judged according to whether it is spoiled or not. If it is kept in good conditions, it can be eaten overnight without spoiling, but if it is kept at room temperature and not sealed, it will be easily contaminated by bacteria and spoiled, so it is not recommended to eat it again. If the fried broccoli is not consumed on the same day, it can be placed in a plastic container and refrigerated. The low temperature of the refrigerator helps to inhibit the growth of microorganisms, and it usually does not deteriorate overnight, so it can be eaten again without seriously affecting your health. If the broccoli preservation method is not correct, such as placed in the state of room temperature, especially in the hot summer, due to the high indoor temperature, overnight may lead to broccoli breeding more bacteria, but also may produce a large number of nitrites, this time the broccoli can not be eaten after overnight. Whether broccoli can be eaten overnight needs to be observed to see if there is any deterioration. If there is deterioration, you should avoid eating it, so as not to bring adverse effects to the body.