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In the heat of the summer, what overnight dishes can not be eaten

author:Love life life Ax

The hot summer has arrived, and in the face of the leftovers at home, many people are troubled: it has fallen, but it is a pity; Do not fall, the next day hot to eat, and afraid of nitrite exceeding the standard, poisoning. It is said that saving is glorious and waste is shameful, but this...

Can I still eat overnight dishes? Which dishes should be thrown away without hesitation and which ones can be eaten at the next meal? How do we deal with overnight dishes scientifically? Today, Xiaobian will answer them one by one~

1 Overnight dishes contain nitrites

Toxic, can it cause cancer?

First of all, it should be clear: overnight dishes do not only refer to the rest of the day, but are placed on the next day's dishes. Scientifically, dishes that are left for more than 8-12 hours are overnight dishes.

The longer the food is left, the more nitrite it will be. Many people are always worried that eating overnight dishes can lead to nitrite poisoning and even cancer. Will this really be the case?

In fact, nitrite itself is not carcinogenic. It is widely present in the natural environment, especially in foods, such as vegetables with an average content of about 4mg/kg of nitrites, about 3mg/kg of meat, and about 5mg/kg of eggs. After the vegetables and fruits are picked and harvested, they will continue to produce nitrites.

In addition, nitrite is also a legal food preservative, as long as it is within the scope of national food safety standards, there is no health risk. For example, nitrites can be added to hams, snacks, barbecue foods, and other pickled foods that we eat regularly in our lives.

In the heat of the summer, what overnight dishes can not be eaten

Ham, snacks, grilled foods and other pickled foods

If too much nitrite is consumed in a short period of time, it can lead to acute poisoning, affecting the functioning of red blood cells and making it impossible for the blood to deliver oxygen. Mild symptoms such as dizziness, chest tightness, shortness of breath, nausea and vomiting, abdominal pain, diarrhea, and bluening of the tips and lips may occur; Severe ones can lead to lack of oxygen to the brain, or even death.

On the other hand, after nitrite enters the acidic environment of the stomach, it will react with the protein eaten, producing a truly carcinogenic nitrosamine. Long-term consumption may lead to cell mutations, and even induce stomach cancer, esophageal cancer, liver cancer, colon cancer and other cancers.

Nitrites can also cause deformities in your baby. Nitrite can enter the fetus through the placenta, and fetuses up to six months are particularly sensitive to nitrite-like substances. Nitrite also has great harm to young children, so the content of nitrite in infant formula milk powder formulated by the mainland is very strict.

Is nitrite exceeded in overnight dishes?

Domestic relevant studies have reported that the minimum toxic dose of oral nitrite in adults is about 300mg-500mg, and ingestion of 1-3g can lead to death.

What is this concept? In general, 24-hour overnight vegetables (excluding pickled vegetables and processed meat stored in refrigerator refrigerators) do not exceed 10 mg/kg of nitrite content.

Therefore, the content of nitrite in overnight dishes is far from the dose of poisoning. Eating a little once in a while is not a big problem. There is no need to talk about overnight dishes to be afraid. The key also depends on the frequency and amount of food eaten.

2 These four overnight dishes are too dangerous to be thrown away if you can't finish eating!

Is it safe to eat overnight dishes?

This is because in the process of storage and secondary heating, overnight food will not only lead to damage and loss of some nutrients, but also easy to breed bacteria, easy to cause gastrointestinal discomfort and even food poisoning. In particular, the following four overnight dishes are not small to the hidden harm to the body, and it is best to throw them away:

Overnight vegetables

Eating vegetables regularly has many benefits. According to the Dietary Guidelines for Chinese Residents, adults should eat 300 to 500 grams of vegetables per day. But there is an old saying: prefer leftover meat, not leftover vegetarian.

If vegetables are left for too long or stored improperly after cooking, a large amount of nitrite will be generated under the decomposition of nitrate bacteria, which will limit the content of nitrite in leftovers.

A food inspection institute did an experiment and found that celery, cabbage and other green leafy vegetables, after frying at 25 ° C for 24 hours, the nitrite content reached an astonishing 100mg / kg or more. It is highly recommended that leafy greens are not eaten overnight.

In the heat of the summer, what overnight dishes can not be eaten

Overnight vegetables

Overnight seafood

Shrimp, crab and other seafood products, through the general cooking and eating methods, it is difficult to ensure the complete elimination of various bacteria that may exist in the seafood itself, so if it is not eaten in time, it will lead to corruption from the inside out!

If you do not eat it on the same day and then eat it overnight, it is possible to multiply the bacteria and produce bacterial toxins, which will cause damage to liver and kidney function.

In the heat of the summer, what overnight dishes can not be eaten

shrimp

White fungus, mushrooms

Many people will put a pot of silver ear soup in the refrigerator and eat it slowly. But this is actually very dangerous!

Whether cultivated indoors or collected in the wild, dried white fungus and mushrooms have lower nitrite content than vegetables, but if the room temperature soaking time is too long or the cooking time is too long, nitrosamines will slowly increase and are also prone to breeding bacteria. If stored improperly, flavivirus may produce flavivirus toxins, and symptoms such as abdominal pain and diarrhea may occur after eating.

【Tips】: White fungus soup can be sealed in the refrigerator for 1-2 days; But it is best not to drink for more than 3 days; If the remaining white fungus in the bowl is not refrigerated, it is best not to eat it the next day.

In the heat of the summer, what overnight dishes can not be eaten

White fungus

Scoop the egg

Many people prefer to eat half-cooked boiled eggs over cooked eggs. However, this half-cooked egg is not thoroughly sterilized and may contain pathogenic bacteria such as Salmonella; Long-term placement is more likely to breed bacteria, and after consumption, it will damage the intestines.

In the heat of the summer, what overnight dishes can not be eaten

Scoop the egg

3 Science stores leftovers and leftovers

Generally speaking, the best food to eat, how much to do, do more, can not finish eating, the rest can be treated according to the following:

Prefer leftover meat dishes, not leftover vegetarian dishes

When a meal is destined to be leftovers, vegetables should be eaten first, and meat dishes can be eaten for the next meal.

Please refer to the following saving schedule:

Green leafy vegetables: keep for 0 days (eat cold vegetables as soon as possible);

Staple food: storage time 1 to 2 days;

Livestock and poultry meat dishes: storage time does not exceed 3 days.

The longer leftovers and leftovers are left at room temperature, the greater the risk of bacteria multiplying; In addition, some bacteria produce toxins that may not be killed by normal home cooking. Therefore, when the dish is cold to a not hot temperature, you can put it in the refrigerator in a plastic box and don't wait until it is completely cool.

It's also important to keep leftovers in the fridge

(1) The upper layer of the refrigerated area: leftovers and other cooked foods can be put in;

(2) The middle of the refrigerated area: suitable for putting fruits and vegetables;

(3) Lower constant temperature refrigeration area: eggs, dairy products, soy products and meat to be eaten on the day can be placed.

This separation of raw and cooked can prevent some of the parasites and bacteria carried in raw food from falling on cooked foods such as leftovers, reducing the risk of cross-infection.

Heat thoroughly before eating

Be sure to heat the leftovers thoroughly before eating them, especially the meat. Thorough heating refers to heating the entire dish to 100 ° C and keeping it boiling for more than 3 minutes.

To avoid uneven heating, you can use chopsticks, forks, and other tools to look inside the food and make sure it's all cooked before taking it out.

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