Can I eat overnight?These 4 categories are too dangerous

It is said that "saving is the traditional virtue of the Chinese nation", but in the face of the leftovers and leftovers in the home, many people have made difficulties in their hearts: it is a pity to fall, it is a pity; Nitrite exceeds the standards "" carcinogenic "and" poisoning ", which makes people worry ...

Can I still eat overnight dishes? Which dishes should not hesitate to pour, which can be left to the next meal? How should we scientifically handle overnight dishes? Today, I will answer them one by one ~

1 overnight dish contains nitrite

Toxic and carcinogenic?

First of all, we need to be clear: the so -called "overnight dishes" are not just to eat the rest of the day and put them in the next day. In terms of science, the dishes with more than 8-10 hours of placement are overnight dishes.

The longer the food is placed, the more nitrite content will increase. Many people are always worried that eating will cause nitrite poisoning and even cause cancer. Is this really the case?

Nitrate itself is not carcinogenic

In fact, nitrite itself is not carcinogenic. It exists in the environment of nature, especially in food, such as: the average content of nitrite in vegetables is about 4mg/kg, the meat is about 3mg/kg, and the eggs are about 5mg/kg. After being picked and harvested, vegetables and fruits will continue to produce nitrite.

In addition, nitrite is also a food preservative that can be legally used. As long as it is within the scope of national food safety standards, there is no health risk. For example: In our lives, ham, bacon and other pickled foods may be added with nitrite.

Under certain conditions, nitrite is toxic

However, everyone always said that overnight dishes are toxic, carcinogenic, and not exactly the wind:

On the one hand, if you consume excessive amount of nitrite in the short term, it will cause acute poisoning, affect the operation of red blood cells, and make the blood from transporting oxygen. There may be symptoms such as dizziness, shortness of breath, shortness of breath, nausea, vomiting, abdominal pain, diarrhea, and lip fingertips into blue; seriousness may cause hypoxia and even death in the brain.

On the other hand, nitrite will react with the eaten protein after entering the acidic environment of the stomach to produce a nitrosamines that really have carcinogenic effects. Long -term consumption may cause cell mutations, and even induce a variety of cancers such as gastric cancer, esophageal cancer, liver cancer, colon cancer.

Is the nitrite overnight?

According to relevant domestic research reports, the minimum poisoning dose of nitrite is about 300mg-500mg, and intake of 1-3g can cause death.

what is this concept? Generally, overnight dishes are stored in the refrigerator refrigerator (not pickled vegetables and processing meat), the nitrite content will not exceed 10mg/kg.

Therefore, the nitrite content in overnight dishes is far from the dose of poisoning. Occasionally, a little problem is not big. There is no need to "talk about the change of overnight dishes". The focus is on the frequency and amount of eating.

2 These 4 kinds of overnight dishes are too dangerous

It is best to pour it out after eating!

So, can overnight dishes be eaten and boldly eaten? no!

This is because during the process of storage and secondary heating overnight meals, it will not only cause damage and loss of some nutrients, but also easily breed bacteria. After consumption, it is easy to cause gastrointestinal discomfort or even food poisoning. Especially the following 4 kinds of overnight dishes, the hidden harm to the body is greater.

Overnight

There are many benefits to eating vegetables. According to the "Dietary Guidelines for Chinese Residents", adults should eat 300 ~ 500 grams of vegetables every day. But there is an old saying good: "Ning left, not left."

If the vegetables are cooked for too long or improper storage, a large number of nitrite is produced under the decomposition of nitrifying bacteria, so that the content of the remaining vegetables is likely to reach the severe limit.

Zhejiang Ningbo Food Inspection Institute had done an experiment and found green leafy vegetables such as celery and spinning vegetables. After frying, it was stored at a normal temperature environment of 25 ° C. After 24 hours, the nitrite content reached an amazing 100mg/kg above 100mg/kg. Essence

It is strongly recommended that green leaf vegetables do not eat after overnight.

Overnight seafood

Seafood products such as shrimp and crabs, it is difficult to ensure that the general cooking and eating methods are difficult to completely eliminate the various bacteria that may exist in the seafood itself. corruption!

If you eat it overnight on the same day, it may cause bacteria to reproduce and produce bacterial toxins, causing damage to liver and kidney function.

Overnight Tremella Mushroom

Many people stew a pot of white fungus soup in the refrigerator and eat several times. But this approach is actually very dangerous!

Generally speaking, dry white fungus and mushrooms, whether indoor cultivation or field collection, the content of nitrite is relatively low than vegetables. However, if the room temperature is soaked for a long time, or it has been putting for a long time after cooking, it will not only increase the production of nitrosamine after consumption, but also it is easier to breed bacteria. After eating, symptoms such as abdominal pain, diarrhea.

[Tips]: Tremella soup is sealed and refrigerated for 1-2 days in the refrigerator; but more than 3 days, it is best not to drink it; and the remaining Tremella in the bowl, if there is no refrigerated storage, the second second, second It is best not to eat it.

Overnight "Heart Egg"

Many people like to eat the "heart eggs" more than the half -life of the half -life than cooked white boiled eggs. However, this semi -cooked egg sterilization may contain a variety of pathogenic bacteria such as Salmonella; it is easier to breed bacteria for a long time, and it will harm the intestine after consumption. [Tips]: If the egg is cooked for the first time, and stored under low temperature and sealing, in this case, it is generally not a big problem to eat overnight.

3 Storage of leftovers and leftovers science

Eat more at ease

In general, the meals are best to eat, how much do you make, really do too much, you can't finish, there is the rest, you can handle the following 4 points:

Ning surplus amaranth, no vegetarian dishes

When you are destined to leave vegetables in a meal, you should give priority to the vegetables. If you ca n’t eat meat, you can leave it to the next meal.

For details, please refer to the following storage time rankings:

Green leafy vegetables: 0 days of preservation (cold vegetables should be eaten as soon as possible);

Stadium: 1 to 2 days of preservation time;

Livestock and poultry meat: The preservation time does not exceed 3 days.

Don't wait until it is completely cold and put it before putting it

The longer the leftovers and leftover dishes are placed at room temperature, the greater the risk of bacteria breeding; and some of the toxins produced by some bacteria may not be killed through normal family cooking.

Therefore, when the dishes are so cold that the temperature is not hot, you can use the fresh -keeping box to pack the refrigerator, don't wait until it is completely cold.

The leftovers are put in the refrigerator, and the location is also critical

① The upper layer of the refrigerated area: you can put the leftovers and other cooked food;

② In the middle of the refrigerated area: suitable for putting fruits and vegetables;

③ The bottom floor of the constant temperature refrigerator: you can put eggs, dairy products, soy products, and meat you want to eat that day.

In this way, the ripening is separated, and some parasites and bacteria that are carried in raw food can be dropped on the risk of cross -infection when they are used in cooked food and other cooked foods such as leftovers.

Heat completely before eating

The leftovers must be completely heated before eating, especially the meat. The thorough heating refers to the overall heating of the vegetables to 100 ° C and keeping boiling for more than 3 minutes.

In order to avoid uneven heating, you can use tools such as chopsticks, forks, etc. to see the inside of the food, and determine that the inside is hot and out of the pot.

(Source: Central Radio and Television Terminal CCTV)

【Edit: Fu Sakura】

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