This summer, it was reported that an old man had died of intestinal necrosis after eating overnight ice watermelon. Therefore, the Internet has also begun to spread the argument of "the overnight ice watermelon can not eat". Others specially analyzed it, pointing out that the reason is that overnight bacteria are so many, with every detail vividly described. 

So, is overnight ice watermelon really related to intestinal necrosis? Can unhealthy overnight vegetables, overnight tea, overnight water, overnight meat and Tremella fuciformis also eat or not?

Nitrite is actually very common in food

First, there is no relationship between overnight ice watermelon and intestinal necrosis. Just think about how many people eat overnight ice watermelon every summer. Do they all have intestinal necrosis? Intestinal necrosis in the news is entirely a case. It has nothing to do with watermelon, ice watermelon and overnight ice watermelon.

Overnight meals are mainly overnight vegetables, overnight meat, overnight tremella soup and so on. Generally speaking, the reason why they cant eat is nitrite, and they often carry the word "carcinogenic".

In fact, nitrite is not a frightening thing, it needs a lot of preconditions to convert into nitrosamines carcinogens.

Moreover, it is so common in fruits and vegetables that almost everyone has it. Many processed meats you eat also contain nitrite, which is mainly used for preservation and color protection.

The most intuitive, you see what color is sauce beef, if it is brown, usually without nitrite. What color is the sauced beef sold in the supermarket? What colour are boiled beef and fried beef in restaurants? Is it a red? Thats whats added.

By contrast, the nitrite in leftovers is nothing at all.

In addition, it may be that you are too young to eat overnight meals, or that you are too forgetful. Didnt we often eat overnight meals before the refrigerator went into ordinary peoples homes? Sometimes we have diarrhea after overnight meals. Thats also a problem of bacterial contamination. Its much better after having a refrigerator.

There are also office workers who bring meals. When you see the Japanese Housewivesbenevolence box lunch, you are envious. Isnt that what they did the day before?

Its nonsense that overnight tea and water cant be drunk

Some people say that the reason why overnight tea can not be drunk is because of nitrite, which I am surprised that a cup of tea during the day can be drunk for one day, why not put it in one night? Do you know how Puer tea comes from? In fact, in addition to the oxidation process, it is high-end overnight tea and add mold fermentation.

As for overnight water can not drink, this is really speechless. Let me ask you, can you drink water for a day? Why cant you drink it overnight? How many days does the water in the thermos still last? I dont know how many nights the water in the water dispenser is still drinking.

Whether overnight food can be eaten depends on the storage conditions.

In fact, its not overnight food you cant eat, its how you store it overnight. For example, leftovers, soups and Brines that stay overnight at room temperature are best not to eat because they are prone to bacterial reproduction and cause diarrhea and other diseases.

The general advice of the scientific community is that leftovers should be stored at room temperature for no more than 4 hours and not more than 2 hours when the temperature is high. My suggestion is that leftovers should be packed and put into the refrigerator when there is residual heat.

Although it costs a little more electricity, it is safer. This is because bacteria reproduce fastest at 20-30 degrees Celsius, so they should be cooled to refrigeration conditions as soon as possible.

In addition, leftovers need to be thoroughly heated when they are eaten again, and should not be stored in the refrigerator for too long.

For salad vegetables, we usually recommend how much to eat and how much to cook. Throw the rest away.

If it is bittern cold dishes or meat dishes that can not be thrown away, such as soy sauce beef, it also needs to be steamed in a pot to be safe.

In a word, there is no reason why you cant eat overnight. Wen/Zhong Kai (Doctor of Food Safety)