Half a century ago, cancer was a little-known disease, but today it is well known to women and children, and the trend is increasing year by year. In recent years, research has found that all cancers are not caused by a single factor, but by a combination of factors and caused. Among them, cancer-causing foods are also “not to blame”. In addition to the food itself, there is no lack of those speculative traders in order to profiteer, in disregard of national laws and regulations, will be some cancer-causing chemicals added to the food, now will be common and may contain carcinogenic substances in food are listed as follows: 1, white bread: potassium bromate as a flour treatment agent, which not only makes the bread whiter, but also makes the bread more fluffy, beautiful. Potassium bromate is in the form of white crystals or granules, which is toxic. Vomiting, diarrhea, renal dysfunction and methemoglobinemia can occur if taken by mistake. Animal experiments have proved that it can cause kidney cancer. The International Agency for Research on Cancer (IARC) has listed this compound as a carcinogen. 2, green turtle: recently found on the market contains “malachite green” turtle. Fishmongers use it to extend the life of the fish, to maintain the role of aquatic products body surface gloss. Snappers dyed with malachite green have a green belly and are less likely to die. “Malachite green” is a fungicide and dye, with high toxicity, high residue and carcinogenic, teratogenic, mutagenic and other side effects. 3, smooth and bright melon seeds: some domestic unscrupulous manufacturers with alum, industrial salt, industrial paraffin and other carcinogenic substances in violation of the production of “carcinogenic melon seeds”. With these ingredients produced by the fried melon seeds smooth and shiny, very attractive appearance. Tsinghua University experts believe that alum, industrial salt, industrial paraffin has been strictly prohibited by the state as an ingredient, consumption may cause cancer. Fried food in the processing of food-grade raw materials, or added industrial-grade raw materials, in the finished product is difficult to monitor. Therefore, the public to buy melon seeds and other food should go to the regular supermarkets, while recognizing the integrity of the enterprise, the integrity of the brand, consumption is more assured. 4, bright red chili sauce: “Sudan red 1” pigment is a red industrial synthetic dye, in our country as well as most countries in the world are not food coloring, therefore, it is not a food additive. Its general use is in industrial products such as gasoline, motor oil, shoe polish and automotive wax, and it cannot be added to food. Animal studies have shown that Sudan Red 1 can cause certain cancers in rats, but it is not a serious carcinogen. China’s regulations, “Sudan Red 1” does not belong to the food additives, is strictly prohibited in the production and operation of chili sauce, chili oil and other food products. 5, duck and pig’s claw: the state expressly prohibits the use of rosin, asphalt and other processed foods that are hazardous to human health. Certain underground duck slaughter farms, but the use of rosin fading duck feathers. From slaughter to fade, each duck has to go through the earth stove on the three large iron barrels. As soon as the ducks go into the barrels to be smoked and cooked, their fine hairs become easy to peel off. Rosin is a by-product of the pine tree collected turpentine by distillation and separation, widely used in the chemical industry, is the production of paint, soap, paper, rubber essential raw materials. As rosin contains a large amount of lead, high-temperature barbecue, wrapped in the body of the duck outside the rosin will seep into the meat, consumption may be harmful to the human body, and in serious cases may cause cancer. In addition, some individual households in the market to sell the pig’s feet and claws is to use asphalt to fade the hair, these pig’s feet and claws look white, even the tiny black hairs have been removed. But asphalt contains 3.4-benzopyrene carcinogen. 6, brightly colored barbecue and preserves: some unscrupulous traders in barbecue, preserves products in the addition of toxicity and Sudan Red No. 1 similar industrial dyes gold powder to improve the appearance of the product color. Golden yellow powder, also known as No. 2 red, chemical name for sulfonic acid phenyl-7 azido-naphthol, mainly used as leather, chemicals and other industrial products, coloring agents, has a strong carcinogenicity, very harmful to humans. In addition, barbecue and candied foods contain a certain amount of nitrite, nitrite is one of the three major carcinogens, it can be combined with amines in the body to form a potential carcinogen amine nitrite. 7, attractive foreign fast food: many people love to eat hamburgers, French fries, fried chicken and other “foreign fast food”, but “foreign fast food” is harmful to health. Swedish food safety agency found that: hamburgers, French fries, fried potato chips, pancakes, roast pork, fruit desserts on the brown crunch, as well as frying, deep-fried and other foods contain a large number of acrylamide. Acrylamide can cause genetic mutations, damage the central and peripheral nervous system, and induce benign or malignant tumors. Foods made by western-style cooking such as frying, grilling, deep-frying and baking produce the carcinogen acrylamide. The World Health Organization stipulates that acrylamide should not exceed 1 mg per kg of food. The American fast food french fries in acrylamide higher than the prescribed standard of about 100 times, a bag of ordinary potato chips exceeded the standard 500 times. 8, barbecue food: when people enjoy the delicious Korean barbecue, lamb kebabs, who would have thought that behind this delicious also hides a huge health crisis. Recently, the U.S. Cancer Research Center study found that eating a grilled chicken leg is equivalent to smoking 60 cigarettes of toxicity. And often eat barbecue women, the risk of breast cancer is two times higher than women who do not love to eat barbecue food. This is mainly due to the fact that meat is grilled directly at high temperatures, and the fat that is broken down drips onto the coals and then combines with the proteins in the meat to produce a carcinogen called benzo(a)pyrene. Research also shows that frequent consumption of barbecue food contaminated with benzo(a)pyrene, carcinogenic substances will accumulate in the body, there is a risk of inducing stomach cancer, intestinal cancer. Some of these chemical carcinogens mixed in food can be detected with the naked eye, for example, the products show bright red color (Sudan Red No. 1), and the shape of the products is white and fluffy (potassium bromate). However, most of them cannot be distinguished by the naked eye, so consumers should be more vigilant and pay attention to these issues when shopping for food.