In fact, vegetables carcinogenic is not the first time in the public said. 90's read some of the Japanese science books, said the Japanese researchers have done different vegetables cooking methods of comparative experiments and animal experiments. It was found that raw vegetables, steamed, boiled and other cooking methods can play its role in inhibiting the development of cancer, but overheated burnt vegetables on the contrary, cancer-promoting effect. The reason is this, although the fresh vegetables are rich in favorable anti-cancer components, including a variety of vitamins, polyphenols, both fish and vegetables, too high a temperature cooking is bound to produce carcinogens.