The reasons why it is best not to eat overnight are as follows: It is recommended not to eat overnight, even if it is steamed again. There are many bacteria in the belly of the screw. After a high temperature, most of them were killed, and some of them survived the heat. Once the temperature drops, they multiply rapidly in cooked protein and water, resulting in the accumulation of harmful substances, which will greatly stimulate the gastrointestinal tract after eating. People who are weak tend to have loose bowels. There are many parasitic bacteria such as screws, clams and sea melon seeds, so it is not recommended to eat them every other day. Nutrition experts remind that vegetables and seafood should not be eaten overnight, and meat must be steamed and cooked thoroughly to prevent food from being stored for too long, rotting and deteriorating, leading to food poisoning. Overnight leafy vegetables are not edible. Eating overnight dishes can easily lead to gastric cancer. Because some green leafy vegetables contain more nitrate, if they are left for too long after cooking, nitrate will be reduced to nitrite under the decomposition of bacteria, which is carcinogenic and cannot be removed by heating. Healthy diet: Generally, the nitrate content of stem and leaf vegetables is the highest, while that of melon vegetables is slightly lower, with roots and cauliflower in the middle. Therefore, if you buy different kinds of vegetables at the same time, you should eat stems and leaves first, such as Chinese cabbage and spinach. If you are going to cook more vegetables and eat them hot the next day, try to make fewer stem and leaf vegetables and choose melons. Overnight soup storage pays attention to the fact that many people like to cook soup, and the endless soup is put in the refrigerator and cooked the next day before drinking. Is this overnight soup good for your health? Healthy diet: The best way to preserve the soup base is not to put seasonings such as salt. After the soup is cooked, scoop out what you want to drink that day with a clean spoon, and it is best to store it in the refrigerator with a clay pot. Because the leftover soup is stored in aluminum pot and stainless steel pot for a long time, it is prone to chemical reaction, so it should be kept in glass or ceramic utensils.