Zhong Nanshan’s urgent reminder: It may cause cancer!

Recently, the first class of the National University for the Aged invited Academician Zhong Nanshan to give a lecture. Academician Zhong Nanshan mentioned: "Old people are often frugal at home. If there are a lot of leftovers that are not clean or fresh, don't insist on eating them all. There are a lot of nitrites in them. (Because of) the so-called frugality, (it leads to) stomach cancer." In this regard, netizens also expressed their agreement:
"It's all right to save, but don't joke with your body! Pay more attention to healthy eating, and don't let leftovers become a burden on your health. Your body is the capital of the revolution!" "Ineffective saving is often more harmful to your body and may cost more." But many netizens also expressed distress: "The elderly won't listen." "It's too difficult to do. Every time I say this to my parents, they scold me." "Some elderly people like to eat leftovers that have been there for a long time, even those that are moldy, and then they like to call their family members to eat together. I personally think that good health is the most important!" Is it better to put the food in the refrigerator when it has cooled down or while it is hot?

Put the food in the refrigerator while it is still hot

The longer food is left at room temperature, the more bacteria will multiply. Putting food in the refrigerator while it is still hot is to reduce the temperature to below 4°C as soon as possible before bacteria multiply in large quantities, thus reducing the time for bacteria to multiply rapidly. Therefore, unfinished food should be taken out in advance, placed in a fresh-keeping box, and stored in the refrigerator as soon as possible.
The refrigerator should not be too full, and the dishes should not be too large. Try to use light, heat-conducting fresh-keeping boxes to speed up the cooling process.

- Pay attention to storage temperature

The temperature of the refrigerator should be set between 0℃ and 6℃, which helps slow down the reproduction of certain microorganisms and reduce the possibility of excessive growth of harmful bacteria or production of toxins in food.

-Store separately

Storing them separately can avoid cross-contamination of bacteria. Store them in clean containers or wrap the dishes with plastic wrap. Take out leftovers from the refrigerator and look at and smell them before eating. After confirming that there is no abnormality, reheat them thoroughly before eating. Before eating leftovers, they must be put back into the pot at high temperature . Heat the whole dish to 100℃ and keep boiling for more than 3 minutes. Turn it over in the microwave and heat it for a few more minutes. Reheat as much as you want to eat and avoid repeated heating. Don't always "reheat before eating"

These foods cannot be "reheated"

Fungus Food

Mushrooms in fungi are stored in the refrigerator at low temperature. After heating the next day, the nitrite content will increase. Frequent consumption of reheated mushrooms may cause abdominal pain, diarrhea and other symptoms. Long-term consumption will increase the probability of digestive system tumors. It is not recommended to continue eating mushrooms after reheating. Try to eat them all at once .

-spinach

Spinach has a high oxalic acid content and needs to be blanched before eating. In addition, spinach contains a large amount of nitrates, which will be converted into nitrites after secondary heating, which is harmful to the human body.

- Tremella soup

Tremella contains a lot of nitrates. If the cooked Tremella soup is left for too long, the nitrates will decompose and return to nitrites. Nitrite will make the hemoglobin in the blood lose its ability to carry oxygen, thereby destroying the body's normal hematopoietic function and affecting health. Tremella soup is best made and drunk immediately, not overnight.

-milk

Repeated heating will denature the protein in the milk, leading to nutritional deficiencies. At the same time, bacteria will multiply rapidly, causing the milk to deteriorate and easily cause diarrhea.

- soft-boiled eggs

Soft-boiled eggs refer to eggs that are not cooked thoroughly. Such eggs cannot completely kill salmonella. If they are left overnight, the chances of bacteria multiplying and producing toxins will increase. Even if they are cooked for the second time, there is still a risk of illness.

Keep these points in mind in life

Avoid leftovers

In daily life, what are some ways to avoid leftovers? - Try to reduce the storage time of vegetables, especially green leafy vegetables, and buy them when you eat them.

Wash leftover vegetables in advance and wrap them in plastic wrap to reduce the bacteria they carry.

Before putting meat, seafood, etc. into the freezer, it is best to cut them into small pieces and take as much as you want to eat, to avoid accelerated spoilage or destruction and loss of nutrients due to repeated freezing and thawing.

If you realize you can’t finish the prepared meals, you can package them and refrigerate them to reduce bacterial contamination.

In addition, we also need to remind everyone that people with weakened immunity, such as young children, the elderly, pregnant women, and people with chronic diseases, cancer, or who are taking immunosuppressive drugs, should try to avoid eating leftovers. If you experience nausea, vomiting, diarrhea, etc. after eating leftovers, you should seek medical attention as soon as possible.