Overnight vegetables, overnight tea, overnight meat and overnight eggs, which one can't be eaten? The truth turned out to be like this

Chinese people have the virtue of thrift. If they are not willing to eat ecological leftovers at home, they will save them. When they eat again, they heat them up. This can avoid food waste and is also a cooking habit of many people.

We have always advocated frugality, not to waste, but to learn correctly, because everything should be viewed from a healthy point of view. Although some overnight foods can be eaten with confidence, some foods are likely to cause lesions.

Overnight vegetables, overnight tea, overnight meat, overnight eggs, which one can't be eaten? the fact is this

——[overnight water]

Since the news that nitrite in water caused cancer overnight came out, people have become more and more afraid of cancer, stimulated in the morning, and even pay great attention to diet and various habits.

As the saying goes: "Talk about cancer color change." Is overnight water really undrinkable? Someone has done professional research on this problem, but it's not as bad as everyone thinks.

Nitrite can develop in water overnight because bacteria in the air convert nitrate to nitrite under boiling conditions. Even mineral water with high nitrate content has 45 mg of magnesium raw gold.

According to the analysis of the normal drinking water of the human body, the real carcinogenic amount cannot be reached, and half of 200 mg will not be poisoned, not to mention that the nitrite in the water is even less than half of the mineral water.

Nitrite is not terrible. The cause of carcinogenesis is the decomposition of depression protein, and the combination of amines produces nitroso compounds, which can lead to gastric cancer and rectal cancer. However, the daily intake of nitrite is limited, and it is not a carcinogenic problem at all.

Overnight water is safe to drink, but water preservation is crucial. Try not to put it in an exposed space, put it in a thermos bottle, which can reduce the growth of bacteria and the fall of dust, and avoid damage to your own health.

——【Overnight Tea】

Whether overnight tea can be drunk has always been a matter of concern. A CCTV reporter once went to a teahouse in Beijing to conduct related experiments. The reporter chose Longjing Pu'er tea and chrysanthemum tea three kinds of teas that people often drink for experiment.

On the first day of the experiment, the reporter brewed three kinds of tea from 9 am to 9 pm and left it for a while. At 9 am the next day, the reporter made three more cups of tea and left it for a while.

Lou Guozhu, a senior national tea reviewer, said: The overnight tea did not deteriorate after being placed for 12 or 24 hours, retaining the original taste. Overnight Pu-erh tea tastes better than tea brewed now.

The reporter also inspected the nitrite in the tea, and the Beijing Institute of Nutrient Sources issued an inspection report. Whether it is now or overnight, the nitrite content is lower than 0.2mg/L; the Longjing tea is left for 24 hours, and the nitrite content increases to 0.26mg/L, which still meets the drinking water hygiene standard.

Some people think that overnight tea should not be drunk, because after drinking overnight tea, it will indeed bring some stimulation, especially in the state of fasting, it will cause gastrointestinal discomfort, it is recommended that you get up in the morning, if you feel thirsty or you should give priority Consider boiling water.

——[overnight dish]

Whether overnight dishes can be eaten or not is a topic of great concern to the public. There are many kinds of overnight dishes. We should also analyze whether it can be eaten according to the actual situation.

① Green leafy vegetables

Soochow University School of Public Health conducted related research, mainly studying the content of nitrite in green leafy vegetables. The results show that although the nitrite content will gradually increase over time, it is far from the standard required by the country. Green leafy vegetables can be eaten with confidence.

②cold dishes

Related studies have shown that there are many enterobacteria in salads. Since bacteria are not eliminated by high-temperature treatment, salads are more conducive to the reproduction of bacteria. Eat salad overnight, otherwise it is easy to cause food poisoning, and the benefits outweigh the losses.

③Leftovers left at room temperature

Storing leftovers in cupboards and other places is a habit of many households, but this placement habit can breed bacteria, because bacteria can multiply in 6 hours at room temperature of about 25°C, producing extremely high bacteria.

——【Overnight Meat】

①Raw meat

Meat itself contains less nitrate, and the safety of meat is very high. The main problem is that the difference between bacterial growth and vegetables is that raw meat carries more bacteria, which is more conducive to the reproduction of bacteria.

Most people buy meat and store it directly in the refrigerator, which will isolate some bacteria from multiplying, so the meat must be thoroughly cooked before cooking to achieve a certain sterilization effect.

②Processed meat

Some people especially like stew, stew is good, but if you can't put a meal in the refrigerator, it may breed nitrite, of course, the amount of nitrite is very small, I hope you have to keep it reasonable Store the stew in the refrigerator.

– overnight eggs

Eggs are a very popular high-protein food. More than 90% of the nutrients in eggs can be absorbed by the body. We have always emphasized that everyone should eat hard-boiled eggs because it eliminates the bacteria in the eggs.

As for hard-boiled eggs, they can be eaten overnight. Even if it is stored for more than 48 hours, there will be no bacteria at all, but if you eat half-boiled eggs, it is difficult to say.

Some people especially like to eat boiled eggs. Half-boiled eggs contain high bacteria, which will aggravate abdominal pain and diarrhea even overnight, so try not to eat half-boiled eggs overnight.

Will there be Helicobacter pylori in overnight dishes?

Whether the overnight dish has Helicobacter pylori needs to be judged according to the situation. It mainly depends on the storage method, storage environment and other factors. When eating overnight dishes, pay attention to the activity of various microorganisms.

If overnight vegetables are wrapped in plastic film and stored in a low-temperature environment, there will usually not be a large number of bacteria or fungi that damage overnight vegetables, and most of them will not be contaminated by Helicobacter pylori;

If an overnight dish is stored in a high temperature environment, it can easily become contaminated with a large number of bacteria or fungi. If exposed to Helicobacter pylori, it will become contaminated with Helicobacter pylori and remain in the overnight dish.

If you want to eat night dishes that need to be sterilized at high temperature, you can reheat them in the microwave. In the process of high temperature heating, Helicobacter pylori can be killed and the probability of Helicobacter pylori infection can be reduced.

Overnight dishes do not rule out the possibility of spoilage. If spoiled, they cannot be eaten after heating, which may cause gastrointestinal damage, may cause gastrointestinal inflammation, abdominal pain, diarrhea and other uncomfortable symptoms, and may also cause food poisoning, nausea, vomiting and other symptoms in severe cases. .

Extension-Can I put the overnight meal in the refrigerator and eat it the next day?

The overnight dinner is mainly overnight vegetables, overnight meat, etc. Whether it can be eaten in the refrigerator the next day is mainly worried about whether nitrite will be produced, which will cause cancer or cause gastrointestinal discomfort. Whether it can be eaten or not needs to consider the time of putting it in the refrigerator, the storage method and observing whether the food has deteriorated.

If the overnight meal is sealed and stored in a refrigerator free of bacterial contamination, it can be eaten properly after being heated at high temperature the next day. If the overnight meal is kept in the refrigerator for more than 24 hours, it is not recommended to eat it.

Because the refrigerator only inhibits the reproduction speed of bacteria by cooling, but if the food is stored for too long, it will also have deterioration phenomena such as acidity, stickiness, and dislocation, and discomfort symptoms such as nausea, vomiting, and diarrhea may appear after eating. At the same time, too long storage time will also lead to poor taste of food and nutritional damage.

However, it is important to note that cold vegetables are not recommended to be stored overnight. Because cold vegetables are contaminated by bacteria during the production process, it is not recommended to eat them even if they have been refrigerated for no more than 24 hours to avoid food safety risks.

Some people have symptoms of discomfort after dinner. If the symptoms are mild, they can drink more salt water, tea, rice soup, etc. to speed up metabolism, or take medicine under the guidance of a doctor to relieve symptoms such as vomiting and nausea. If the symptoms are severe, they should be sent to the hospital immediately for gastric lavage, diarrhea, enema and other treatment, and corresponding infusion treatment is required.