Frozen steamed buns can't be eaten? Will breed aflatoxin? doctor tell the truth
Mantou is an indispensable staple food for three meals a day for northerners. There are steamed buns in every family's refrigerator. There is also a meal without steamed buns. I always feel like something is missing, like I'm not eating.
Now every family will freeze some steamed buns in the refrigerator and eat them at any time, which is very convenient. But many people question this situation because long-term freezing can produce aflatoxins that are harmful to humans. Is there any scientific evidence?
About Mantou
what is mantou
Steamed buns, also known as steamed buns, are one of the traditional pasta dishes with Chinese characteristics. It is a fermented and steamed food made from flour. It is round and raised. Here are the fillings. Later, it was called non-stuffed steamed buns and stuffed steamed buns. Usually, northerners choose steamed buns as their staple food.
Mantou is one of the main daily staple foods in China, with wheat flour as the main raw material. However, with the improvement of living standards, people began to pay attention to the health care properties of staple foods, and most of the natural raw materials were added with nutritional fortification and health care steamed buns.
【Benefits of eating steamed buns】
- Lift your spirits
The lack of B vitamins in the human body will cause fatigue, and steamed bread is rich in B vitamins. Therefore, proper consumption of steamed buns can supplement the vitamins needed by the body, thereby improving fatigue symptoms and boosting the spirit.
- Strengthen nutrition
Don't think that taking these supplements is the only way to enhance your body's nutrition. Eating steamed buns can also achieve this effect. The calcium, magnesium and iron contained in steamed bread can be well absorbed by the body and digested quickly.
[How long does it usually take to steam steamed buns]
Steamed buns also need to master the heat. Generally speaking, steamed buns can be matured within 15 minutes. However, if the steamed buns are relatively small, they can be cooked in 10 minutes. If the buns are relatively large, it may take more than 15 minutes.
Don't put cold water in the pot when steaming the steamed buns, so that the steamed buns will continue to absorb water vapor during the heating process, causing the bottom to bubble.
It is best to wait until the water in the pot is boiled for steaming. When steaming starts, it is best to put the steamed buns into the pot to steam. The time for steaming buns also starts to count from here.
Popular Science: What is aflatoxin?
Aflatoxin is aflatoxin, a poisonous substance. Currently, the World Health Organization considers it a carcinogen. It is mainly metabolites produced by Aspergillus flavus, and there are about 20 species.
Aflatoxins exist in all aspects of our lives, especially in hot and humid environments. From peanuts, corn, soybeans to soil, animals and plants, all may be contaminated by aflatoxin.
If aflatoxin is poisoned, gastrointestinal symptoms such as stomach discomfort may appear in the early stage. There are also severe reactions such as abdominal distension, nausea, vomiting, hepatosplenomegaly, jaundice, ascites, and internal bleeding.
Can't eat frozen buns? Will it breed aflatoxin? Doc tell the truth?
Some people think that frozen steamed buns cannot be eaten, as they will breed aflatoxin, which is very harmful to the body. So is this really the case?
The experts conducted corresponding tests on these 10 groups of steamed buns and found no aflatoxin. Just found out that there are cracks on the surface of the steamed buns, and a lot of water is lost.
Then 10 groups of steamed buns were tested accordingly, and no aflatoxin was found. This is because the growth temperature of aflatoxin is 10-33°C, and the temperature in the refrigerator is below 0°C.
Therefore, it is not suitable for the growth of aflatoxins. It does not cause aflatoxin problems even when stored in the refrigerator for about 10 days. Then the expert replied: Frozen steamed buns will not produce aflatoxin.
However, if it is not cleaned in the refrigerator, it can also lead to the reproduction of other bacteria and viruses. This can lead to fungal infections that can wreak havoc on the body. Therefore, we should pay attention to cleaning some refrigerator diets in time.
What items hide aflatoxin?
- Moldy peanuts
Both shelled and unshelled peanuts are susceptible to mold. Ordinary peanut shells are khaki, and after shelling, the peanut kernels inside have a pink coat.
If it is moldy and deteriorated, there will be a layer or a mass of black or gray mold, which contains aflatoxin. If you can't eat peanuts, you can store them in a plastic bottle with the lid on to avoid mold and spoilage.
- Long-term soaking of fungus
Black fungus itself has no toxins, but it contains dietary fiber and protein. If soaked for too long, it will deteriorate and produce aflatoxin.
It is also possible to breed a large number of microorganisms. Therefore, the fungus cannot be soaked for a long time, generally soaked for about 15 minutes.
- Condiments
If it is stored at low temperature, not only the shelf life cannot be extended, but it will be damp, which will cause some condiments to deteriorate and produce aflatoxin.
At this time, it will affect your health, so it is best to store condiments like this in a ventilated and cool place.
Extended topic: Three kinds of steamed buns are harmful to health. It is recommended to eat less.
First of all, the steamed buns that look very white
While the steamed buns look appealing and appetizing to consumers, real white steamed buns are made with wheat flour. The color cannot be pure white. It is usually a light yellow in nature. This is the color of healthy buns.
We usually buy steamed buns from shopping malls, supermarkets or steamed bun shops, but they look very white and lack yellow. Whitening agents are usually added to the flour when making this kind of steamed buns.
Therefore, steamed buns look very white and tender, and long-term consumption of this substance will cause certain damage to our skin and respiratory tract.
- Moldy buns
Steamed buns stored for too long or improperly stored will cause mold and spoilage. Spotted buns will no longer be used. Aflatoxins can be numerous. Aflatoxin is a serious carcinogen with certain liver toxicity.
Regular consumption will also increase the burden on the liver. Therefore, if you find moldy steamed buns at home, you must throw them away in time. Don't buckle on the bad parts, eat well, it can also damage your health.
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- Fried buns
Many people in life are willing to cut the steamed buns into slices. The taste of the steamed buns is really good, but it should be noted that the steamed buns are made of starch.
When starch is fried at high temperature, it will produce a harmful substance - acrylamide. This substance is very harmful to intestinal absorption, so it is recommended that you try not to eat fried steamed buns.