"Don't buy so many chestnuts to eat, it's carcinogenic."
Old Liu, who came home after walking the dog, saw his wife holding a bag of sugar fried chestnuts while eating and chasing the drama, and couldn't help but open his mouth to persuade.
"I don't eat every day, it's rare to have free time this weekend, why can I eat some chestnuts cause cancer so seriously?" Besides, aren't there many articles on the Internet saying that chestnuts are rich in nutrition? His wife, who has loved chestnuts since childhood, couldn't help but reply.
"But you eat not just chestnuts, but sugar-fried chestnuts, which may be filled with paraffin oil, which is carcinogenic."
Subsequently, Lao Liu sat down next to his wife and told her in detail about the harm of paraffin oil.
After listening to her husband's story, the wife suddenly felt that the chestnut in her hand was not fragrant, and the chestnut that was put in her mouth did not know whether to put it in her mouth or throw it into the trash can next to her.
Lao Liu said conclusively, can chestnuts really cause cancer?
Surprisingly, the topic of sugar fried chestnuts causing cancer is caused by the stone of fried chestnuts, so let's first understand why sugar fried chestnuts should be stoned.
Chestnuts contain two main parts, the outer shell and the inner layer of the kernel, and the specific heat capacity of the two is very different. In layman's terms, chestnut fruit shells easily absorb the heat transferred from the cauldron, thereby increasing their own temperature. The thermal conductivity of the fruit shell is relatively low, and it does not transfer its own heat to the kernels that are lower than the heat capacity, which will lead to the problem that the shells are burned and the nuts are not ripe.
Some people may see this and think, what does this have to do with the stone of fried chestnuts?
Of course, it has a lot to do with it.
The heat absorption of the stone is also very strong and relatively uniform, and it does not soar in temperature like the fruit shell, so it can make the temperature of the chestnut shell rise evenly, and in the process, the nuts can also absorb heat evenly and ripen.
In a word, the sugar-fried chestnuts are stoned so that the chestnuts are cooked more evenly.
Where did the carcinogenic paraffin mentioned by Lao Liu mentioned above come from? Why does it appear in sugar-fried chestnuts?
We often say that the color and flavor are complete, compared with the dry sugar roasted chestnuts, the oily smooth and shiny sugar roasted chestnuts look more attractive and delicious, so many merchants will add cooking oil when frying chestnuts. However, due to the relatively expensive price of edible oil, some black-hearted merchants will exchange edible oil for low-cost industrial paraffin oil.
The polycyclic aromatic hydrocarbons and thick cyclic aromatic hydrocarbons in paraffin wax both exceed the limits of national health standards, and both of these ingredients are carcinogenic, so long-term eating sugar fried chestnuts with paraffin wax will cause cancer.
Paraffin wax also contains lead and mercury, the former of which causes anemia and peptic ulcers, and children with growth retardation;
But we must understand a reason that sugar roasted chestnuts themselves are not carcinogenic, and carcinogenic is the industrial paraffin added by black-hearted merchants. Therefore, as long as we know how to distinguish which sugar fried chestnuts do not have paraffin wax, we can eat chestnuts with confidence.
1, look at the color: if the shell of the chestnut looks too dark and shiny, and the color does not change after a period of time, then it is likely to add paraffin wax.
2, touch feeling: if the chestnut is very smooth to the touch, rather than some sticky hands, then it is likely to add paraffin wax.
3, water bubbles: paraffin is insoluble in water, if the chestnuts in hot water soaking will appear oily floating matter, then it may also be added paraffin wax.
As long as we pay attention to avoid the sugar fried chestnuts with paraffin wax, then eating a little chestnut is good for health, after all, chestnuts are not only delicious, but also high in nutrition.
In the early winter, there will be many vendors selling sugar fried chestnuts in the streets and alleys, which are also loved by many people because of its sweetness and deliciousness.
In fact, chestnuts are not only delicious, but also rich in nutrients.
According to the calculation of 100g of chestnuts, the carbohydrate, protein and dietary fiber content in it are 40.5g, 4.2g and 1.7g, respectively. It can not only provide energy for the human body, but also has the effect of strengthening the spleen and protecting the intestines.
In addition, chestnuts are also rich in unsaturated fatty acids, which have a certain role in preventing cardiovascular and cerebrovascular diseases.
In addition, the riboflavin in chestnuts is also good for adult mouth ulcers and pediatric oral and tongue sores, which can alleviate inflammation of the skin and mucous membranes. And the vitamin C content of chestnuts is also very high, which can play a role in helping the elderly prevent osteoporosis.
It can be seen that chestnut is not only rich in nutrients and has many effects, but also suitable for all ages, and is an ideal health care fruit. However, everything should be moderate, and eating chestnuts should also be moderate.
Chestnuts are known as woody grains, and to some extent, chestnuts can replace staple foods.
However, we generally do not recommend eating more chestnuts, and the number of chestnuts eaten every day should not exceed 10, and 6-7 is better.
If you eat 10 more chestnuts and eat staple food, it is equivalent to eating an extra bowl of rice. If the chestnuts you eat are flavored with sugar, the calories are higher. Therefore, it is recommended that in addition to controlling the amount of chestnuts eaten, it is also necessary to reduce the intake of staple foods accordingly.
If you really don't want to reduce the amount of staple food, then you can also consume these additional calories in the form of exercise, which can effectively prevent fat.
Although chestnuts are delicious and have health care effects, if they belong to the following 4 categories of people, it is recommended to eat less.
One is people with bad stomach or indigestion. The soft, sticky taste of chestnuts benefits from the abundance of starches in them, which are not friendly to people with bad stomachs or indigestion, because these starches are more difficult to digest.
The second is people who are often constipated. Although chestnuts are rich in dietary fiber, they are more starchy and contain fat, which is more difficult to digest, so it may make constipation worse.
The third is diabetics. Chestnuts have a higher sugar content, and eating more can easily cause the patient's blood sugar to rise. Diabetics eating a little chestnut properly is healthy, but it must not be eaten more, especially sugar fried chestnuts.
The fourth is children. Children's gastrointestinal digestive function is relatively weak, if you eat more chestnuts, the fiber substances contained in it will quickly ferment in the stomach and intestines and produce gas, so that children have flatulence, hiccups and other discomfort.
Although the sugar fried chestnuts are delicious, you must pay attention to them when purchasing them, so as not to buy chestnuts with paraffin wax. It is recommended that you buy unprocessed chestnuts to cook at home, which can be steamed, boiled and stewed, which not only has a high health coefficient, but also reduces the intake of sugar and salt, which is more health-friendly.
Resources: [1] Why should sugar-fried chestnuts be fried with stones? Years of confusion solved..." People's Daily .2020.05.20 [2] Popular Science | Sugar fried chestnuts actually add carcinogens? How to choose to avoid? China Medical News.2019.01.16 [3] Chestnuts eaten into stomach bleeding? Don't give your children more than this amount", China Education News.2020.11.20
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