Viewpoint 1: Doll vegetables cause cancer, and the cause of cancer is formaldehyde.
The viewpoint is that the unknown liquid dipped in the doll dish is formaldehyde solution, and the doll dish soaked in formaldehyde looks good and keeps for a long time. Formaldehyde has been identified by WHO as a carcinogen and teratogenic substance. When used on vegetables, it will cause cancer.
Experts reveal:
What is formaldehyde?
Formaldehyde is an organic compound with special pungent odor, colorless and irritating to eyes and nose. In 20 1 1 year, the National Toxicology Plan of the United States described formaldehyde as a "known human carcinogen".
40% formaldehyde solution is called formalin, and 4% formaldehyde solution is used in hospitals to soak corpses.
Can eating baby cabbage cause cancer?
Formaldehyde is not a food additive, and it is illegal to add it to doll dishes, so doll dishes purchased through formal channels without adding illegal additives will not cause cancer.
Conclusion: Baby cabbage will not cause cancer, so people who eat it don't have to worry about it.
Viewpoint 2: Pteridium aquilinum causes cancer, and the cause of cancer is protopterin.
It is believed that there is carcinogen called protopterin in Pteridium aquilinum, which is proved to be carcinogenic by animal experiments. When Pteridium aquilinum is fed to mice, gastric cancer, intestinal cancer, breast cancer, bladder cancer and leukemia occur in mice.
Experts reveal:
What is protopterin?
Protopterin is also a very unstable compound, which can be dissolved in hot water or hot ethanol, and can be transformed into pterin B with no carcinogenic activity under acidic conditions at room temperature, and may be transformed into nearly carcinogen/mutagen-an unstable diketene under alkaline conditions, which can make the DNA structure unstable and break, thus triggering a series of abnormal cell reactions, and finally leading to cell mutation.
The alkaline environment of bovine saliva (pH 8.1-8.2) may be the reason for the carcinogen activity of fern. Studies have shown that fern powder can also cause cancer after being eaten by rats in large doses for a long time. (Zhou Qiong, Xiao Kaitian and Zhang Tao in Wild Plant Resources in China, Volume 22, No.6, Pteridium and Its Research Progress)
Can eating bracken cause cancer?
First of all, there is no clear international standard for the toxicity and limited dose of protopterin. For example, bread will also produce some carcinogenic nitrosamines when baked at high temperature, but I haven't heard of anyone stopping eating bread because of this.
In addition, the toxicity of a carcinogen varies greatly among different species. It doesn't mean that people will be poisoned if they eat it. There is limited evidence of carcinogenicity to humans and insufficient evidence of carcinogenicity to experimental animals. As long as you don't eat bracken as a staple food in large quantities, it's no problem to eat it occasionally.
Conclusion: The evidence of Pteridium aquilinum on human carcinogenesis is not sufficient, and there is no problem as long as it is eaten improperly in large quantities.
Viewpoint 3: Zucchini causes cancer, and the cause of cancer is acrylamide.
The viewpoint is that zucchini itself is not carcinogenic, and after high temperature frying, it will release carcinogenic acrylamide. Experiments show that the summer squash releases the most acrylamide after heating at high temperature, with an average of 360 micrograms per kilogram, which is only lower than that of snack chips (680 micrograms) and French fries (390 micrograms).
Experts reveal:
What is acrylamide?
He Yuxian, a consultant doctor of the Hong Kong Centre for Food Safety, explained that when food containing asparagine and reducing sugar is fried at a high temperature above 120 degrees Celsius, it will produce a chemical reaction to form acrylamide.
acrylamide
Asparagine is a natural amino acid, and its content is high in beans and vegetables. The International Agency for Research on Cancer has classified acrylamide as the second carcinogen.
In addition, acrylamide can also damage the human nervous system, and high doses of acrylamide can make people depressed, hallucinate and even lose their memory.
How to eat zucchini?
① Don't cut the vegetables too thin before frying. The thinner they are, the faster they are heated, and the easier it is to release acrylamide.
② Don't stir-fry for too long at ordinary times, and don't eat the fried vegetables, which will obviously increase the harmful substances;
3 vegetables should not be roasted. Vegetables that are brown, dark and black after roasting often have "Maillard reaction" and contain carcinogens;
Never wait until the oil smokes before frying. This will not only make the vegetables release acrylamide more easily, but also produce a lot of toxic substances.
Conclusion: Zucchini is eaten stiffly in a scientific way, which is healthy and nutritious and does not cause cancer.