garden stuff

Vegetables can be roughly divided into leaves, melons and fruits, mushrooms and so on.

Judging from the content of nitrite, the content of leaves is the highest, melons and fruits are slightly lower, and mushrooms are in the middle.

Therefore, leafy vegetables, such as green vegetables and Chinese cabbage, are best not to stay overnight.

According to scientific experiments, the nitrite content of green leafy vegetables such as spinach will increase from 3mg/kg to 7mg/kg after 24 hours if they are not turned and put in the refrigerator after cooking. Although it has not reached the amount that can make people toxic, it is better to eat less.

Moreover, after repeated heating, leafy vegetables lose the most nutrients and taste worse.

If you plan to make a lunch and eat it overnight, you can choose vegetables such as eggplant, wax gourd, potatoes, carrots, cauliflower and mushrooms.

meats

The meat we often eat is mainly chicken, pork, beef and so on.

If you want to make an overnight lunch, you should first choose chicken and beef, because pork is not easy to preserve and will easily turn sour.

Moreover, beef and chicken have higher protein content and better nutritional value.

Fish and seafood

Fish and seafood are not recommended to be eaten overnight, because they are easy to produce protein degradation products after overnight, which will damage the liver and kidney function.

Moreover, fish and seafood are very easy to breed bacteria, even if they are kept in the refrigerator.

bean products

Generally speaking, bean products can be eaten overnight as long as they are not spoiled, and because of their high content of protein, calcium and magnesium and low vitamin content, secondary heating has little damage to their nutritional components.

However, bean products are particularly difficult to preserve, and it is easy to oxidize and stink and grow bacteria.

02. The security risks of overnight lunch.

Overnight lunch brings us convenience, but it also brings many security risks:

Bacterial growth

Overnight lunch is very easy to breed bacteria, especially meat, fish, bean products and so on. Among them, dangerous pathogens, such as Clostridium botulinum, are likely to appear.

Bacteria are produced in many ways, such as not putting vegetables into the refrigerator in time, and the refrigeration effect of the refrigerator is not good.

Increased nitrite content

All vegetables contain nitrate, and the contents from high to low are: petiole, leaf, stem, root, flower, potato, bulb, fruit and seed.

In other words, vegetables such as beans, cucumbers, tomatoes and onions have low nitrate content, while vegetables such as green vegetables and Chinese cabbage have high nitrate content.

No matter what kind of vegetables, the content of nitrite will increase overnight, but it will basically not exceed the limited amount.

The limit of nitrite content in China is 4mg/kg for vegetables, 3mg/kg for fresh meat and 3mg/kg for rice.

Loss of nutrients

After secondary heating, there will be some loss of nutrients in food, among which the loss of nutrients in leafy vegetables is the most serious.

03. Proper preservation methods

Separate sealed preservation

Meat and vegetables should be stored separately and sealed, which is not easy to cross-taste, and can also prevent bacterial pollution to a certain extent.

Put it in the refrigerator immediately after cooling.

You can't put it in the refrigerator when it is hot, because the backflow of water vapor will accelerate the growth of bacteria and lead to mildew of food.

When the food is cooled, it should be put in the refrigerator immediately, and the bacteria grow rapidly at room temperature.

04. Correct heating method

Ensure thorough heating

When you eat it the next day, be sure to heat it completely, because heating at high temperature for a certain time can kill most bacteria.

You can go back to the pot and add some seasoning

If possible, you can add some seasoning to the pot, which can sterilize and season. If you don't have a wok, you can consider steaming in a steamer, which can reduce nutrient loss.

Let's sum up

Overnight lunches can be eaten, and there is no such exaggerated carcinogenic effect, but you should pay attention when choosing ingredients. The better ingredients are

garden stuff

Beans, cucumbers, tomatoes, onions, potatoes and other fruits and mushrooms.

meats

Beef and chicken

bean products

Choose a good dish to make a delicious lunch ~