Overnight meat, overnight vegetables, overnight tea and overnight eggs, which is more unhealthy? The truth is coming!

The Chinese are thrifty and thrifty "virtue". Leftovers at home are reluctant to throw away, but are kept and eaten the next day. From a health perspective, are overnight meals detrimental to personal health?

We need to understand that overnight food is not related to overnight food "night". Fried rice is not finished at night, and we continue to eat this kind of food after the next morning, which is generally called overnight food.

But if the dish fried in the morning is eaten at night, isn't it overnight? From a food science point of view, overnight is not a problem, the essence of the problem is whether the dish has spoiled during preservation.

Our biggest concern is that nitrate is converted to nitrite in vegetables, which can be achieved by the original reductase enzyme in the vegetable. However, when the vegetables are heated, the enzyme is inactive, and the pathway is apparently blocked.

There is a way to easily breed bacteria. It turned out that the vegetables were almost wiped out by the cooked bacteria, but it was inevitable that there would be bacteria on the chopsticks when eating. During the preservation process, bacteria in the air can enter the food and are more likely to cause food spoilage.

Cooked vegetables are more suitable for bacteria to grow and thrive in the right conditions. At this time, it is more likely to cause food spoilage and seriously affect health.

Which is more unhealthy: overnight meat, overnight vegetables, overnight tea, or overnight eggs? Here comes the truth!

【1】Overnight water

After the news that nitrite in water can cause cancer overnight, many people are very worried, because after boiling water at home, it is impossible to drink it all at once, and most of it will be stored in a thermos.

As the saying goes, "talk about cancer discoloration". Is overnight water OK to drink? On this subject, you can put your heart in your belly. Overnight water can be safely drunk, and how much you drink will not increase the risk of cancer.

Nitrite is produced because, under boiling conditions, the action of bacteria in the air converts nitrate to nitrite. Even with nitrates, mineral water is relatively high, and Beisheng Street has 45 mg.

Nitrite does not cause cancer, it can cause cancer, because after entering the body, it combines with the protein decomposition product amine to produce carcinogenic substances represented by nitrosamines, called nitroso nitroso compounds, which will increase the risk of gastric cancer and rectal cancer. risks of.

【2】Overnight tea

Can I drink tea overnight? A CCTV reporter once went to a teahouse in Beijing to do an experiment. The reporter chose Longjing, Pu'er, and chrysanthemum tea for experiments.

On the first day of the experiment, the reporter brewed three kinds of tea from 9 am to 9 pm. After leaving it for a while, at 9:00 the next morning, the reporter brewed three more cups of tea and left it for a while.

National senior tea taster Lou Guozhu tasted three kinds of tea made at different times, saying that the overnight tea did not deteriorate for 12 hours or 24 hours, and retained the original flavor. Overnight Pu-erh tea tastes better than tea brewed now.

The reporter sent the sample to the Beijing Institute of Nutritional Sources, and the nitrite content data showed that the nitrite content of Pu'er tea and chrysanthemum tea was much lower than 0.2mg/L; the nitrite content of Longjing tea placed for 24 hours was 0.26mg /L, still in line with drinking water hygiene standards.

Tea is rich in phenols, which can achieve antioxidant effects and remove harmful substances from the body, so tea can be drunk overnight without worrying too much.

【3】Overnight dish

Whether overnight vegetables can be eaten is closely related to the type and storage conditions, so different types of vegetables are different from overnight vegetables.

①Green leafy vegetables

The Soochow University School of Public Health conducted a study on the nitrite content in overnight dishes. The results showed that although nitrite levels gradually increased over time, it was far from harming the body. It can be seen that overnight green leafy vegetables can be safely eaten.

②cold dishes

Research shows that there are about 132 different types of Enterobacteriaceae. The pathogen comes from raw corn and vegetables. Since there is no high temperature treatment, it is more conducive to bacterial reproduction, so it needs to be taken with caution. If possible, you must cook the food before eating it.

③ Leftovers left at room temperature

It is a habit for many people to store overnight dishes in cupboards and other places. Is this kind of food edible? The answer is of course no. Because at room temperature around 25 ℃ in the environment, bacteria will continue to multiply, and a large number of bacteria will be produced within 6 hours.

This is where the refrigerator comes in handy. If overnight food is stored in the refrigerator, it can reduce bacterial growth, prevent food spoilage, and avoid food poisoning.

【4】Overnight meat

The meat itself has very little nitrate, generally the meat is very safe, the main problem is that bacteria multiply and vegetables are perfect for bacterial growth, raw meat itself is distributed in modern drama.

Even at the fresh-keeping temperature of the refrigerator, raw meat can grow a lot of bacteria after a few days. If the meat is cooked and killed, the bacteria originally carried will be kept for a relatively long time.

After the raw meat is cooked, the bacteria will also be destroyed after a long period of high temperature heating. The input heating is usually mild and produces bacteria that will not be destroyed, but are more dangerous.

It is recommended that you buy fresh meat in your life. Because eating low-quality meat itself can damage your health, storing it in the refrigerator and eating it overnight is more likely to cause your own health damage.

However, it is recommended not to eat overnight seafood, because overnight seafood is easy to produce protein, and after being degraded into the body, it is easy to cause serious damage to the liver and affect the health of the digestive tract.

Improper preservation of seafood may also breed a large number of toxic and harmful substances, causing serious damage to the body. Even every year, many people damage their health because of eating seafood by mistake, which may end up life-threatening. Pay more attention to your diet.

5 overnight eggs

Eggs are relatively small, but be careful when eating them overnight, because eggs are prone to salmonella, but if you heat them enough, they will be eliminated. If your eggs are not fully cooked, you can damage your health.

In life, some people especially like to eat half-boiled eggs, which feel better in taste and more nutritious, but in fact, bacteria are not completely eliminated, and eating into the body can easily increase the risk of food poisoning, causing abdominal pain and diarrhea.

It is crucial to store eggs overnight. The first time you boil an egg, be sure to cook it thoroughly. When storing, try to put it in a low temperature state to avoid bacterial growth.

As a reminder, eggs are best eaten and made now. The high heat removes most of the nutrients in the eggs and they taste delicious. Try not to eat overnight eggs, soft-boiled eggs and fried eggs in your life.

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Safe eating rules for overnight dishes

⑴ After cooling, put it in the refrigerator immediately

If you want to store food in the refrigerator, you have to dry them to the right temperature, because hot food goes into a low temperature environment, hot food can cause water vapor to condense, which promotes mold growth and causes mold in the food in the refrigerator. After cooling, put it in the refrigerator in time. Even in winter, do not leave it outside for long periods of time.

(2) Different leftovers should be stored separately

Separate storage can avoid cross-contamination of bacteria. It needs to be stored in a clean container, such as a fresh-keeping box, a fresh-keeping bag or a bowl and plate wrapped in a layer of plastic wrap. No seasoning is added to the soup overnight. The soup is scooped with a clean spoon to drink the same day, and the rest is put in the refrigerator.

(3) Before eating, return to the pot and heat through

In addition to reasonable storage, reheating is the key to keeping the refrigerator healthy. Before eating, be sure to return to the pot to heat, heat the dish to above 100 ℃, and keep it boiling for three minutes, because low temperature can only inhibit the reproduction of bacteria, and high temperature cannot completely eliminate bacteria, but it can eliminate most harmful bacteria.

⑷ Eat overnight food within two days

Studies have shown that nitrite levels can rise dramatically if leftovers are left at room temperature for more than 8 hours. Even in the refrigerator, the refrigerator is only bacteriostatic. If not sterilized, the bacteria will still multiply and grow slowly. Leftovers can generally be eaten within 2 days, and it is best to throw them away after 3 days. Typically, leftovers in the refrigerator won't spoil for two weeks, but it's also recommended to eat them within a week.

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⑸ Regularly clean the refrigerator

The refrigerator is not as perfect as you might think, and the refrigerator is not a panacea, and it is likely to breed all kinds of bacteria, especially E. coli.

Remove refrigerated food and eat immediately,