2, bracken causes cancer, and the cause of cancer is protofern glycoside.

3. Zucchini causes cancer, and the cause of cancer is acrylamide.

1. Doll vegetables cause cancer, and the cause of cancer is formaldehyde. It is believed that the unknown liquid soaked in the doll plate is formaldehyde solution, and the doll plate soaked in formaldehyde looks good and lasts for a long time. Formaldehyde has been identified by WHO as a carcinogen and teratogenic substance. When used on vegetables, it will cause cancer. What is formaldehyde? Formaldehyde is an organic compound with a special pungent smell, colorless and irritating to eyes and nose. 20 1 1, the National Toxicology Program of the United States described formaldehyde as a "known human carcinogen". 40% formaldehyde solution is called formalin, and the hospital uses 4% formaldehyde solution to soak the body. 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 bought through formal channels without illegal additives will not cause cancer. Conclusion: Baby cabbage will not cause cancer, so people who eat it need not worry.

2. bracken causes cancer, and the cause of cancer is protopterin. It is believed that there is a carcinogen called protopterin in bracken. Animal experiments have proved that bracken is carcinogenic. When Pteridium aquilinum is fed to mice, they will develop gastric cancer, intestinal cancer, breast cancer, bladder cancer and leukemia. 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 a near 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 eventually leading to cell mutation. The alkaline environment of bovine saliva (pH 8. 1-8.2) may be the reason why pteridophyte carcinogens are active. 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 and China Wild Plant Resources, Vol.22, No.6, Pteridophytes and Their Research Progress). Can eating bracken cause cancer? First of all, there is no clear international standard for the toxicity and limit of protopterin. For example, bread baked at high temperature will also produce some carcinogenic nitrosamines, but I haven't heard of anyone who doesn't eat bread because of this. In addition, the toxicity of carcinogens varies greatly among different species. It doesn't mean that people will be poisoned if they eat it. There is limited evidence of carcinogenesis to humans and insufficient evidence of carcinogenesis to experimental animals. As long as you don't eat a lot of bracken as a staple food, it's okay to eat it occasionally. Conclusion: The evidence that Pteridium aquilinum is carcinogenic to human body is not sufficient, as long as it is eaten improperly in large quantities, there is no problem.

3. Zucchini causes cancer, and the cause of cancer is acrylamide. The viewpoint is that zucchini itself is not carcinogenic, but will release carcinogenic acrylamide after high-temperature frying. The experiment showed that the most acrylamide was released from the pumpkin after heating at high temperature, with an average of 360 micrograms per kilogram, which was only lower than that of snack chips (680 micrograms) and French fries (390 micrograms). What is acrylamide? He Yuxian, a consultant doctor of the Hong Kong Centre for Food Safety, explained that the food containing asparagine and reducing sugar will react chemically to produce acrylamide after being fried at a high temperature above 120 degrees Celsius. Conclusion: Zucchini is hard to eat, scientific to eat, healthy and nutritious, and does not cause cancer.