It can be seen that in our daily vegetables, vegetables such as day lilies, tomatoes and beans that have been artificially planted for many years often contain "harmful substances". If cooked and eaten improperly, it will also cause physical discomfort and even food poisoning. Then, obviously, some unruly edible wild vegetables must also contain substances harmful to human health.
For example, these two kinds of wild vegetables, bracken and Toona sinensis buds, which are very familiar to everyone, all contain harmful substances that endanger human health. The old people in the village all say that eating raw food is "toxic". Picking (buying) in spring will bring negative effects and even serious consequences to health, and the original intention of tasting wild vegetables will be lost. If you know some "characteristics" of these two edible wild vegetables, it is like knowing that puffer fish is poisonous. We didn't just eat. As long as it is properly handled, cooked and eaten, we can taste it from time to time in spring, and our life will be healthier and more perfect. Moreover, these two traditional wild vegetables have a wide audience and have been eaten by the people for many years. You can enjoy the taste of spring as long as you don't know how to eat indiscriminately.
Pteridium aquilinum: This traditional wild vegetable has the reputation of "king of wild vegetables". It has been popular among the people for many years, and many people like to eat food made of bracken. Usually, people wash the picked fresh bracken, remove the old terrier and fist of bracken, rinse it repeatedly with clear water for several times, wash off the floating soil and fluff on the surface, and blanch it in boiling water for 2 minutes until the bracken changes color, becomes soft and feels soft. Then immediately pick it up, take a "cold water bath" on the cooked bracken, and then soak it in cold water for a certain period of time. After that, you can make the processed bracken into Shan Ye delicacies according to your personal preferences, or store it in the refrigerator for tasting from time to time.
With the continuous improvement of people's material living standards and the attention to food safety, relevant experts have found through research that Pteridium aquilinum contains a natural toxin called protopterin, which may be highly carcinogenic to mammals, and has been listed as a Class 2B carcinogen by the World Cancer Organization. There is limited evidence that this 2B carcinogen is carcinogenic to humans, but insufficient evidence that it is carcinogenic to experimental animals. Or there is insufficient evidence of carcinogenesis to humans and sufficient evidence of carcinogenesis to experimental animals. In fact, as early as in the history of our country, Sun Simiao, a "medical sage", said that eating bracken "will not heal for a long time", which shows that eating bracken often will have a negative impact on people's health.
Then, a friend said, why do people in our village eat bracken and Toona sinensis buds every year and find no problems? Otherwise, bracken can't be the "king of wild vegetables". There is a simple reason. According to the life experience handed down from generation to generation, the bracken picked by farmers has excellent growth environment, no pollution and good quality. Moreover, after soaking and blanching in boiling water, the original bracken glycoside will dissolve in water, evaporate when heated, or cook at high temperature to reduce harmful substances in bracken; For this seasonal wild vegetable, it is only tasted from time to time every year. From this, we can easily see that villagers have three "no's" when eating bracken-not raw, not much and not often, which greatly reduces the invisible harm of carcinogens to human body. So we should eat bracken skillfully, not because we can't eat it.
Toona sinensis: Toona sinensis buds are traditional seasonal wild vegetables, which are found in many rural areas. In order to facilitate picking and beautify the environment, people in many places also like to plant Toona sinensis trees in front of and behind their houses until spring comes. A Toona sinensis tree was planted in my old yard. Due to the geographical and climatic factors in the north, it has not sprouted yet. However, this is not important. Because Toona sinensis buds are delicious and there are many fans, Toona sinensis has become a cash crop in some places. It provides consumers with Toona sinensis buds as early as possible to generate income through close planting in greenhouses, so many supermarkets now sell Toona sinensis buds.
We often come into contact with Toona sinensis. Through some popular science knowledge, we know that its leaves contain nitrate and nitrite, and the older Toona sinensis buds contain more harmful substances. When I was a child, I was not sensible. I look at the tender buds of Toona sinensis, and sometimes I just pick one and eat it raw. Adults will tell us not to eat it raw, saying that it is "toxic" and will endanger people's health. According to the popular science knowledge about Toona sinensis, there are more than 30 nitrites in each kilogram of Toona sinensis bud, and the nitrite content in each kilogram of old Toona sinensis leaves can be as high as 53.9. People will be poisoned if they eat too much nitrite, so some people in the village say that Toona sinensis is "toxic". This has also been reported in the media, so I won't go into details here.
In order to reduce the negative impact of Toona sinensis buds on health, the fragrance of lips and teeth is endless. According to the summary of life experience and modern science knowledge of Toona sinensis buds, people know that there are few harmful substances in tender Toona sinensis buds and nitrite is easily soluble in water. Therefore, first of all, we should try to select or buy fresh, tender Toona sinensis buds with low content of harmful substances, and then soak them for many times, which can effectively reduce the content of harmful substances. Then after boiling the water, the nitrite content in it is greatly reduced. After the processed Toona sinensis buds are processed or cooked, the toxins in them are very few, as low as the normal level, so it will not have much negative impact on our health.
Conclusion: Pteridium aquilinum and Toona sinensis buds do contain some harmful substances, which are really "toxic" wild vegetables. As long as you don't eat it raw, overeat, eat it for a long time, and taste it occasionally, it can be said that it is beneficial and harmless to your body.
Friendly reminder: some home-cooked dishes that have been planted for many years still contain "poison", not to mention some wild vegetables. For example, red Feng Cai, which contains a lot of pyrrolizidine alkaloids, has hepatotoxicity and is very harmful to the body after long-term consumption; There are also young leaves of Solanum nigrum, which contain solanine. Improper or excessive consumption can also lead to human poisoning. So you see, wild vegetables are still wild vegetables after all. Although there are still some wild vegetables as food and medicine, some people with physique are not suitable for eating. People who don't understand should pay attention. First of all, we must understand the related wild vegetables. For example, the buds of Toona sinensis and Ailanthus altissima are highly similar. If you don't know, you can't just pick it, so as not to pick the wrong one. The problem of eating by mistake is quite serious. Let's talk about picking, processing, cooking and eating wild vegetables. As long as you master the right method and taste it occasionally, you can promote people's health and taste the flavor of the season. This is also the good intention of people who eat wild vegetables. # The Challenge of Three Rural Issues #