thrift is the traditional virtue of the Chinese nation, so many people are reluctant to throw away the unfinished food. They think that putting it in the refrigerator is the best way to store it. In fact, some overnight dishes will deteriorate even if they are put in the refrigerator, and even have the risk of cancer. What overnight dishes can't you eat?
Six kinds of overnight dishes are best thrown away
Green leafy vegetables overnight
Some green leafy vegetables contain more nitrates. If they are cooked for too long, the nitrates will be reduced to nitrite under the decomposition of bacteria. But in fact, the growth of nitrite in overnight food is not as terrible as people think.
Experiments show that if spinach and other green leafy vegetables don't turn after cooking, put them in the refrigerator for 4 ℃ cold storage. After 24 hours, the nitrite content rises from 3 mg / kg to 7 mg / kg, so you don't need to worry about the carcinogenic problem if you eat half a kilogram of spinach every day.
The vitamins in green leafy vegetables almost disappear after repeated heating. Therefore, it is not suitable to preserve vegetable dishes or cold dishes for a long time.
Overnight soup
It takes time and effort to cook soup. People often cook a big pot and eat it for several days in a row. Is this overnight soup good for you?
If the leftover soup is kept in an aluminum or iron pot for a long time, harmful substances will be separated out. The best way to store the soup is not to put salt and other seasonings in the soup; when the soup is cooked, use a clean spoon to put out what you want to drink on that day; when you can't finish drinking, it's better to use glassware, ceramic ware, and fresh-keeping box to store in the refrigerator, and it's better not to use aluminum pot, stainless steel pot, etc.
Overnight bulk brine
Brine is the food we like to eat. Many people like to put the leftover brine in the refrigerator for 'overnight'. This practice has a great potential for food safety. Even the food in the refrigerator is not absolutely safe. It is easy to breed mold, psychrophilic bacteria, etc. It's better to eat the bittern on the same day instead of putting it for a long time.
Overnight egg
Whether eggs can be eaten overnight depends on whether they are cooked for the first time. If the eggs are cooked for the first time, and stored at low temperature and under sealed conditions, there is no problem for 48 hours.
But now many people like to eat half cooked soft eggs. The yolk is half liquid. You can't eat them overnight. Even if you cook them for the second time, you'd better avoid them.
Overnight mushroom, Tremella
No matter it is wild or cultivated mushroom, tremella, agaric, etc., it is easy to leave a lot of nitrate, but that is the amount of dry products. After foaming, the content of nitrate has become 1 / 10, which is far lower than that of many leafy vegetables.
If there are more hair bubbles at one time, just change the water and put it into the refrigerator, then you can avoid the smell and smell. You can still continue cooking after washing the next day. But if it is cooked and put for a long time, it is recommended to discard it.
Overnight tea
Overnight tea for too long, most of the vitamins have been lost, and the tea soup protein, sugar, etc. will become bacteria, mold breeding nutrients.
Even tannic acid in tea may become a strong irritant oxide, which is easy to hurt the spleen and stomach and cause gastrointestinal inflammation. So overnight tea is not as safe as new tea. It's best to avoid it.
But there is no basis for saying that "overnight tea is poisonous". Because normally only 1-2g tea is put into a cup of tea, the total amount of nitrate is quite small, and the total amount of nitrate in a cup of tea is only 6mg, even if all of them become nitrite, it will not cause poisoning.