Is it true that you can t eat overnight dishes? Wrong! The scientific squirrel will debunk the rumor

Can you eat overnight dishes?

In general, although the nitrite content in overnight dishes has increased, the content is limited and does not pose a substantial impact on human health. Therefore, as long as it is stored properly, the nitrite content in overnight dishes will not increase significantly, and the nitrite content is much lower than that of ham sausages and pickled vegetables allowed by food safety standards, so there is no need to worry too much. Of course, it is best to eat vegetables freshly made, and if you can't finish them, they should be refrigerated.

Can you eat overnight vegetables, will eating overnight vegetables have an impact on your health, vegetables contain nitrates, because of nitrate content leaves, stems, roots, try not to stay overnight, eating will be bad for your health; Processed foods: ham, hot dogs, bacon, sausages, bacon, etc. should also be avoided overnight, which will also affect health; If the overnight dish is braised meat to be cooled and stored in the refrigerator, it will be more able to preserve the nutrition when heated the next day, and the food will not deteriorate, so it is best to choose the seasonal ingredients, and it is best to eat the meal, if you do not finish eating, it is important to keep the ingredients fresh, the refrigeration temperature should be lower than 7 degrees, and the ingredients are not easy to deteriorate, and it will be better for your health to heat and eat the next meal, so as long as the overnight dishes are well preserved, they can be eaten.

Can you eat overnight dishes?

Can you eat overnight dishes?

Answer: Many people in life have different understandings of overnight dishes, many people must think that overnight dishes are overnight dishes, in fact, "overnight dishes" do not only refer to dishes that have been put overnight, if they are placed for more than 8 or 10 hours, they should be counted overnight. "Overnight dishes cause stomach cancer", "Overnight mushrooms are poisonous" and so on There are many sayings about overnight dishes, in fact, not all overnight dishes can not be eaten, so what are the overnight dishes that cannot be eaten?

In fact, the shelf life of soy milk is the shortest, the normal situation is that it must be drunk in 2 hours, or it will be thrown away, because the number of bacteria breeding is very large, and it will cause deterioration in a short time, the best is to drink and squeeze, or put the boiled soy milk in the refrigerator first, be sure to seal and store it in case he is infected with bacteria by other substances in the refrigerator, but not too long in the refrigerator. After 12 hours, don't eat it anymore and throw it away.

In fact, this is because some dishes contain a lot of nitrate, once the food containing nitrate is left for too long, nitrate is easy to be reduced to nitrite under the decomposition of bacteria, and nitrite is a substance harmful to the human body, easy to cause cancer, so there is a saying that leftovers can not be eaten overnight.

As a practical matter, it should be considered that not all foods contain nitrates, that is, not all foods can be reduced to carcinogens overnight.

For example, seafood food, undercooked eggs, white fungus, etc., these foods may not be eaten overnight, such as seafood food is easy to produce protein degradants after overnight, and it is easy to decompose the human body's protein after ingestion, which is not beneficial to the human body, and uncooked eggs are not well preserved, which can be said to be a hotbed for bacterial reproduction, so it is not recommended that people eat overnight, and the reason why white fungus can not stay overnight is similar to seafood food.

While some foods cannot be left overnight, there are three exceptions.

We ordinary people live at home, cook and cook every day, and there will be leftovers almost every day. Some people say: "Overnight meals are unhygienic and nutritious, and should be thrown away"; Another person said, "You can eat overnight meals as long as they don't go bad." In fact, neither statement is comprehensive.

It is important to take care of leftovers. Of course, it is best to have no leftover rice and put it in the pot according to the amount of rice per person. If leftovers, they should be loosened and placed in a ventilated, volumetric, and clean place to avoid contamination. When the temperature of leftovers is about to reach room temperature, refrigerate them.

The storage time of leftovers should be eaten without meals, breakfast at noon, lunch at night, and try to shorten it within 5-6 hours. Be sure to heat leftovers thoroughly before eating, and they should be heated thoroughly before eating. Do not eat leftovers soaked in hot water or vegetable soup, and do not pour leftovers into new rice to avoid incomplete heating.

It should be emphasized that leftover rice is easy to cause food poisoning, and most of the time, the rice does not look unusual, nor is it rancid or sour, but it is unpleasant, slightly sticky or slightly peculiar smell, and must be thoroughly heated before eating.

The overnight dish was contaminated when it was eaten and stored for a period of time, and the microbial content in the dish was high, so there was indeed a hygiene problem, and improper consumption would affect health.

So, what's the trick to overnight dish processing?

1.Put it in the refrigerator as soon as possible after consumption to shorten the storage time at room temperature to slow down the growth and reproduction of bacteria in the dish.

2.It must be heated before the next meal is consumed, because some pathogenic bacteria can cause illness even though they do not cause food spoilage. If the food is heated, it can kill most of the microorganisms in the food.

3.The microwave oven can destroy the internal structure of microorganisms in a short time, and the sterilization effect is better than that of traditional "fire". Of course, at the same time of heat sterilization, the vitamin C in vegetable foods will be destroyed and some nutrients will be lost.

It's best not to eat it, especially for people who don't have a very good stomach!

According to the test, the nitrite in the leftovers exceeds the standard, which is harmful to the body! Now that the conditions are good, try not to eat leftovers, but many old people come by eating leftovers, just as healthy and long-lived, it may be that the current meat and vegetables are not pure natural, and the harm is greater!

Hello, eating overnight meals is not good for people's health, because after a night will produce some harmful substances to the body. It's better not to eat and try not to cook too many meals at night.

It is well known that leftovers often have the problem of excessive nitrite. Statistics show that 80% of the nitrite intake comes from vegetables. When the prepared dish is left in a warmer place for a long time, the nitrite content will increase.

In addition, it should be reminded that it is best not to eat leftovers of cold dishes, regardless of meat and vegetables, because if they are not heated, the bacteria in cold dishes are not easy to be killed, and it is easy to spoil your stomach if you eat too much.

It is undeniable that eating leftovers is not as good as eating fresh after all. However, eating leftovers is always unavoidable, especially for some office workers who live alone, and the amount of cooking is really difficult to control. Leftovers contain an excess of nitrites.

Nitrite itself is toxic and meets proteins in the stomach to produce nitrosamines, a carcinogen.

With a high temperature of 100 °C, certain bacteria, viruses and parasites can be killed in a matter of minutes. But for the chemical toxins released by bacteria in food, heating is powerless. Heating not only does not destroy the toxins, but sometimes increases their concentration.

In addition, various green leafy vegetables contain different amounts of nitrates. Nitrate is non-toxic, but during the picking, transportation, storage, and cooking of vegetables, nitrate is reduced to toxic nitrite by bacteria. Especially leftovers that have been left overnight, after being salted overnight, the nitrite content will be higher.

Leftover vegetables are really harmful. First of all, nitrates and nitrites are already very abundant in fresh vegetables, and eating a certain amount of nitrate and nitrite is not harmful to the body, and the real carcinogenic is the nitrosamine compounds produced in leftovers contaminated by bacteria.

It's hard work. Now, in fact, there is plenty of food and drink, no one is hungry, and there is even a surplus of some agricultural and sideline products, resulting in direct discarding. However, for those who have come over in the past life, a grain of rice on the table and a piece of leftovers will be cherished.

Some are because they miss the old, and some are because they are not rich and live a thrifty life. Some people tell you that there are some things about leftovers that are not good for your health. I actually think it's more hypocrisy.

The old men and women in the countryside can work in the fields at the age of seventy or eighty, and what they eat may be porridge and rice, and the leftovers are still very healthy.

In the countryside, cooking dinner will be cooked more than the next morning. Children eat to school, adults eat workmanship, and there is no refrigerator at all, so it usually tastes some in summer. It's not that people live a long life.

My grandmother lived to 97, my aunt lived to 90, my uncle lived to 87, and so on.

If you really can't eat often, it is recommended to eat less leftovers and overnight dishes, of course, you may not get stomach cancer, but it will still affect your health. The storage time of leftovers should not be eaten, eat in the morning and lunch, eat in the afternoon, try to solve it within 5 or 6 hours, and it is best not to eat overnight dishes. According to scientific determination, some overnight vegetables, especially overnight green leafy vegetables, not only have low nutritional value, but also produce disease-causing nitrite.

Almost all the old people in our village can live more than 90 years, most of them are very frugal, eating leftovers is commonplace, sometimes seeing the white hair is still eating, anyway, no one will throw it away.

Although there will be some increase in nitrite content in vegetables during the preservation process, the total nitrite content under refrigeration conditions is still much lower than the content allowed by the national standard in processed foods. The increase in nitrite content in meat should be caused by the nitrate-containing seasonings used in the cooking process. This is not the case in regular cooking.

Even if the experimental data in the news is accurate and reliable, the claim of "serious exceedance" is a misinterpretation of national standards, and "must not be eaten" is even more sensational. If the cooked vegetables are sealed while they are hot and refrigerated quickly, the risk of "overnight dishes" is negligible.

Only grandparents are at home all year round, because of grandma's special thrifty character, it is impossible to pour leftover dishes or anything, and a dish must be placed on the table for more than two days in winter. This year, my grandmother is eighty-one years old, and my grandfather is about to be ninety. Now, grandpa even often rides an electric tricycle to go shopping, and grandma is not inferior to young people in farm work.

Hawkers, practice is the only criterion for testing the truth, fresh food is indeed better than leftovers, but leftovers are definitely not that dangerous.

Carcinogens do exist.

Nitrogen is a widely occurring element in nature, and nitrogen fertilizer is necessary for the growth of plants. Plants absorb nitrogen from the environment and eventually synthesize amino acids through complex biochemical reactions. Nitrate is an unavoidable step in the process.

There are some reductases in plants that can reduce a portion of nitrate to nitrite.

So, all plants contain nitrates and nitrites. Current scientific research generally considers nitrate itself to be non-toxic. If nitrite enters the human body in large quantities, it may lead to "methemoglobinosis", in which the blood loses its ability to carry oxygen, resulting in hypoxia symptoms, which may be life-threatening in severe cases.

Under normal circumstances, the content of these nitrates and nitrites in vegetables is still quite far from the dose that is harmful to the human body.

Overnight dishes have nothing to do with the night.

From a food science point of view, it's not a problem to have a dish overnight. The essence of the problem is what happens to the cooked dish during the preservation process. Nitrates in vegetables are converted to nitrite.

This transformation process can be achieved by the original reductase enzymes in the vegetable, which lose their activity and the path is truncated as the vegetable is heated and cooked. Another way is bacteria, originally the vegetables are cooked, and the bacteria in them are almost killed, but in the process of eating, some bacteria on the chopsticks will enter the leftovers; During storage, some airborne bacteria may also enter. Cooked vegetables are more suitable for bacteria, and nitrates can be converted to nitrite during growth.

This process has nothing to do with overnight or not, only with the conditions of storage.

As mentioned above, the production of nitrite in vegetables, the raw material is nitrate in vegetables, and the transformation conditions are mainly bacterial growth, and "overnight" is only a matter of time. Reducing nitrite production can be multi-pronged. First of all, reduce the preservation time of vegetables, especially green leafy vegetables, and increase the frequency of grocery shopping.

Secondly, the vegetables that need to be preserved can be washed and wrapped to reduce the bacteria carried. Uneaten vegetables can also be sealed and stored in the refrigerator. In general, from the perspective of "deliciousness", "overnight dishes" are indeed poor; From a nutritional point of view, multiple heating does have an effect; But from a safety point of view, there is nothing wrong with heating.

Science Squirrels will).