Celery can be eaten overnight after cooking, but it is not healthy.

The so-called overnight food does not only mean that the food is placed overnight, placed more than 8-10 hours, even if the overnight food. Why is eating overnight food bad for the body? First, once the food is placed for too long, it will produce harmful substances such as nitrite, even if the heating is not removed. Secondly, because the food in the process of storage and placement, may be subjected to foreign bacterial secondary pollution, the loss of nutrients not to mention germs will also increase.

For example, we have to eat green leafy vegetables every day, because rich in vitamins and dietary fiber, green leafy vegetables are essential dishes on every family dinner table. Frequently eaten green leafy vegetables: spinach, oatmeal, bok choy, celery, oilseed rape these dishes are not recommended to eat again after overnight. After high-temperature cooking and frying, the color will change, not eaten will continue to oxidize, even if placed in the refrigerator, not only nutrition will be a large number of loss, the same will produce a large number of nitrites, so green leafy vegetables after overnight is not recommended to eat again.

The second food that is not recommended to eat overnight is seafood, because seafood is a high protein food, overnight protein degradation is easy to produce, will damage the body's liver function. In addition shrimp, crab and other seafood food bought back to be cooked immediately, because of their intestinal presence of a variety of bacterial parasites and spoilage material.

If because of some force majeure factors must eat overnight food, you can also through some correct storage methods to slow down the deterioration of food. First of all, leftovers and leftovers should not be left at room temperature for more than two hours, especially not for more than an hour in the upcoming summer. The key to minimizing bacterial growth is to allow the food to cool quickly, you should try to divide large amounts of food into several small containers and cut meat foods into small pieces or thin slices. When the food is placed, ensure that raw and cooked separately, you can prevent the cross-propagation of bacteria

In addition to contain leftovers of the vessel material should also pay attention to, overnight soup is best not to put salt or less salt, with closed glassware storage, because stainless steel or aluminum may be and salt, vinegar and other seasonings to react, resulting in the generation of harmful substances.