Not edible.

Steamed dishes in a lot of uneaten stored away, especially some high-protein and high-fat leftovers, but also can not eat. Harmful bacteria in the air will be attached to the leftovers within 2 hours to start reproducing, in the protein and fat in the role of bacteria, most of them will produce harmful substances, such as hydrogen sulfide, amines, phenols, etc., which are harmful to the human body.

Fried vegetables have oil, salt, overnight, vegetables in the vitamins are oxidized, so that the nitrite content increased dramatically, into the stomach into nitrite, nitrite into the stomach, in the presence of specific conditions will generate a called NC (N-nitroso compounds) of the material, which is one of the risk factors for the induction of gastric cancer.

Especially in hot weather, overnight meals are contaminated by bacteria, which will multiply and easily cause gastroenteritis and food poisoning. It is not suitable for consumption.

Extended information:

Leafy greens are most dangerous overnight. Stem and leafy vegetables usually have the highest levels of nitrates, with squash vegetables a little lower and roots and cauliflower in the middle. Therefore, if you buy a large number of vegetables at the same time, you should eat leafy vegetables first, such as cabbage, spinach and so on. If you are ready to make more dishes to eat hot the next day, you should try to do as little as possible stem and leafy vegetables, and choose melon vegetables.

Overnight seafood damage to the liver and kidneys. Crabs, fish, shrimp and other seafood, overnight will produce protein degradation products, damage to liver and kidney function. If you really buy more than one, you can put the raw seafood in a plastic bag or plastic box, put it in the refrigerator to freeze, and cook it next time.

Half-cooked eggs are easy to cause disease. Many people love to eat soft yolk half-cooked eggs, but this kind of egg sterilization is not complete, coupled with the egg nutrient-rich, extraordinarily easy to breed bacteria, consumption will be dangerous. If the egg has been cooked, and low-temperature sealing properly preserved, eat again overnight is no problem.

Be careful with psyllium mushrooms. Whether it's wild or cultivated psyllium and mushrooms, it's easy to retain a lot of nitrates. If you leave them in for really a bit too long, you'll just have to bear the pain and throw them away.

Soup don't put metal utensils. Boil soup time-consuming and laborious, people tend to boil a big pot, eat for days. Leftover soup, if long held in aluminum pots, iron pots, will precipitate harmful substances. The best way to save the soup is not to put salt and other seasonings in the soup, cooked soup with a clean spoon to drink the day, drink not finished, it is best to use the pot or preservation box stored in the refrigerator.

Baidu Encyclopedia - Overnight Vegetables