Overnight water, overnight vegetables, and overnight tea, are they poisonous and carcinogenic? tell you the truth
Nowadays, many young people generally eat leftovers, thinking that it is not good for their health, but for the older generation, leftovers can’t be thrown away, and they think they have eaten all their lives, and it’s nothing. Question, so I usually eat it the next day, so can I eat overnight dishes?
In addition, there are overnight water and overnight tea. Can you still drink it?
1. Does overnight water contain carcinogens?
Many people attribute cancer to their usual unhealthy living habits, and even think that overnight water also contains carcinogens and cannot be drunk.
In fact, people think that overnight water cannot be drunk, mainly because they are worried about carcinogenicity after nitrite enters the human body, but there is no material basis for carcinogenicity in overnight water, so there is no need to worry about the presence of carcinogens in boiled water overnight.
As long as you choose a regular source of water and drink the right water, you don't need to worry about cancer. It is recommended to drink water in small amounts and many times. It is best not to wait until you are thirsty to drink water, and it is best for men to drink enough 1700 ml a day and women to drink 1500 ml.
Although there are various types of drinking water on the market, boiled water is the most economical.
2. Overnight dishes contain nitrite, can't you eat them?
There are rumors that overnight dishes contain nitrites and it is best not to eat them. Is this statement true?
Zhejiang Ningbo Food Inspection Institute once tested the nitrite content of 30 home-cooked dishes in the refrigerator, at room temperature for 0, 6, 12, and 24 hours, and found that they were refrigerated in the refrigerator. In the stored dishes, the nitrite content of different test times basically did not change.
Dishes placed at room temperature, especially vegetable dishes, have a significant increase in nitrite content with time .
Although the overnight dishes placed in the refrigerator are basically edible, experts recommend that overnight green leafy vegetables, overnight seafood, overnight half-cooked eggs, overnight braised food, overnight cold dishes, overnight potatoes, and overnight Tremella mushrooms should not be eaten. .
3. Tea overnight, will it be harmful to the human body if you drink it?
In addition to overnight dishes and overnight water, some people think that overnight tea can't be drunk. If the tea is left overnight, is drinking it really harmful to the human body?
The researchers used seven kinds of tea leaves, including Pu'er raw tea, Anji white tea, Longjing tea, Anhua dark tea, Pekoe flower tea, and Tieguanyin tea, to boil and leave it at room temperature for 24 hours. The content of black tea is less than one thousandth of the safety standard.
Therefore, there is no need to worry about the nitrite content in the overnight tea exceeding the standard, but the tea polyphenols in it will continue to be lost over time. In addition, the following types of tea should be avoided.
1. Raw tea
Drinking raw tea is likely to increase the irritation to the gastric mucosa and cause stomach discomfort, so it is best not to drink raw tea.
2. Spoiled tea
The spoiled tea is likely to contain bacteria that are harmful to the body, so it is best not to drink it.
3. Head tea
In the process of tea production, various pollutants will inevitably exist. Therefore, it is best not to drink the first tea directly. It is recommended to pour it out as soon as possible and then pour it into boiling water to make tea.
4. Strong tea
Theophylline and caffeine in strong tea are high, and improper drinking may cause symptoms such as vomiting, dizziness, and headache.
5. Kuwacha
Tea that has been brewed for a long time will not only reduce the nutrients, but also may have microbial contamination. It is recommended to dump it in time.
Regarding the statement of overnight water, overnight tea, and overnight dishes, everyone must treat it rationally, but it is recommended to drink fresh water or tea with a short brewing time as much as possible in normal times, and avoid drinking some strong tea, spoiled tea, etc., and also Be careful not to drink hot tea.
References:
[1] When is the best time to drink water? 10 small entanglements in drinking water, one solution. Tencent Medical Code. 2021-11-16
[2] Can overnight dishes be eaten? The expert finally gave a clear answer, tell your parents quickly! .Tencent Medical Code.2019-10-09
[3] These 9 kinds of tea must not be drunk! It contains pesticides and bacteria, which can cause poisoning. Family Doctor Online.2017-05-02
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