Is bracken a green and healthy food?

With the coming of spring, all kinds of wild vegetables begin to come into our sight, because they are produced in the mountains and fields, making these green food the favorite of the dining table However, a popular saying that wild vegetables and ferns are carcinogenic has been spread on the Internet recently Yun Wuxin, a science writer and doctor of food engineering at Purdue University in the United States, pointed out that scientific evidence supports that eating bracken can lead to an increase in the incidence of esophageal cancer and gastric cancer Chen Chaogang, Nutrition Department of Sun Yat Sen Memorial Hospital, Sun Yat sen University, said that although some wild vegetables are green and pollution-free, they are not the recommended food in our food list after all Whether they are suitable for long-term consumption remains to be studied and explored scientifically In order to ensure the safety of eating, it is suggested that we should choose as few wild vegetables as possible Some people regard it as the delicious taste of green health preservation Fern, also known as fist dish, is a kind of tender bud of wild fern The ancients thought that it is delicious and can cure diseases Lu's spring and Autumn Annals said: "the beauty of dish: the flourishing of cloud dream" Zhuo is fern wild vegetable According to Chinese medicine, fern tastes sweet, cold, has the effect of clearing away heat, removing dampness and swelling, calming nerves, activating blood and relieving pain It can be used to treat fever In the difficult period of life, people pick ferns to satisfy their hunger In recent years, food safety issues have attracted much attention Fern is back to the table again, becoming a popular green food Cantonese who pay attention to health care are also very fond of this At this time, in spring, Baiyun Mountain (600332, Guba) and Huolu mountain can see people digging ferns Fern According to the legend, it is not only "safe" and "pollution-free", but also has rich nutrition and even has the function of "anti-cancer" Research has confirmed that it can cause cancer But recently, there was a popular saying on Weibo that "fern can cause cancer" The source came from an article called "natural wild vegetables can cause cancer" published by Yun inadvertently, a member of scientific squirrel Association, a master of biochemistry from Tsinghua University, and a doctor of food engineering from Purdue University of the United States a few years ago The article Yun Wuxin said in the article that "fern causes cancer" has solid scientific evidence support Eating fern will lead to higher incidence of esophageal cancer and gastric cancer, and the "original fern glycoside" in fern is the main cause of the above symptoms More than 100 years ago, it was noted that fern, a plant, can cause cattle poisoning When cattle are consumed in large quantities, they will die in a few weeks as soon as possible; even if they don't eat as much, they will also lead to leucopenia, thrombocytopenia, and acute massive bleeding In the 1970s, the relationship between bracken eating and esophageal cancer was investigated in the mountains of central Japan It was found that among the residents there, eating bracken increased the incidence of esophageal cancer by 2.1 times in men and 3.7 times in women In North Wales, the incidence of gastric cancer has been very high A case-control study conducted in 1990 also showed that eating more ferns in childhood increased the risk of later gastric cancer Similar studies have been done in other parts of the world, and the results are basically the same As early as in the "Journal of Guiyang Medical College" in the third issue of 1994, there are records of pharmacological research on "carcinogenesis of Pteridium aquilinum" Several experts raised rats with fresh sweet fern and bitter fern, processed sweet fern and dry powder of bitter fern for 7 months The experimental results showed that Pteridophyte can induce cancer and promote tumor growth Chen Chaogang said that there are few studies on carcinogenesis of Pteridium aquilinum in China, but on the whole, "pure natural" is not equal to "health" and "safety" Whether it's wild vegetables or the vegetables we often eat, there are all kinds of phytochemicals The phytochemicals in the vegetables we often eat are generally harmless to the body, and whether the wild vegetables are also safe and safe to eat remains to be revealed by scientific research It is better to eat less wild vegetables and game, and natural traditional food is not necessarily safe It's better to eat less ferns, but it's not necessary to panic if you eat less occasionally.