garden stuff

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

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, had better not 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 over and put in the refrigerator. Although it does not reach 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 cook a lunch and eat it overnight, you can choose eggplant, wax gourd, potatoes, carrots, cauliflower, mushrooms and other vegetables.

Edible meat

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 tends to 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 it is easy to produce protein degradation products after overnight, which will damage liver and kidney function.

And fish and seafood are very easy to breed bacteria, even in the refrigerator.

bean products

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

However, bean products are particularly difficult to preserve, and are easy to oxidize and stink and breed bacteria.

02. Safety risks of overnight lunch.

Overnight lunch not only brings us convenience, but also brings many security risks:

Bacterial growth

Overnight lunch is very easy to breed bacteria, especially meat, fish and bean products. Among them, dangerous pathogens, such as Botox, 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.

Nitrite content increased

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 limit.

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

Nutrient loss

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

03. Correct preservation method

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 some extent.

Put it in the refrigerator immediately after cooling.

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

Food should be put into the refrigerator immediately after cooling, and bacteria grow rapidly at room temperature.

04. Correct heating method

Ensure thorough heating

When you eat it the next day, you must heat it thoroughly, 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 there is no wok, consider steaming in a steamer, which can reduce nutrient loss.

Let's sum up

Overnight lunches can be eaten without such exaggerated carcinogenic effects, but you should pay attention when choosing ingredients. A better ingredient is

garden stuff

Fruits and mushrooms such as beans, cucumbers, tomatoes, onions and potatoes.

Edible meat

Beef and chicken

bean products

Choose a good dish to make a delicious lunch ~