The World Health Organization announced the results of a three-year study, saying that the carcinogens produced by barbecue food are toxic, and "eating barbecue is equivalent to smoking". The report of a research center in the United States even said that eating a roast chicken leg is equivalent to smoking 60 cigarettes; Women who often eat barbecue are twice as likely to develop breast cancer as other women.

Eating too much barbecue is easy to cause cancer. Because the meat is directly barbecued at high temperature, the decomposed fat drops on the charcoal fire and then combines with the protein in the meat, which will produce a carcinogen called benzopyrene. Experts explained that if people often eat barbecue food contaminated with benzopyrene, carcinogens will accumulate in the body, which may induce gastric cancer and intestinal cancer. At the same time, there is another carcinogen in barbecue food-nitrosamine.

The reason why barbecue food can't be eaten more is mainly because its fat content is too high, which is extremely unsanitary and difficult to digest. In addition, because the stall owner adds spices and other things to the barbecue, the fat ingested by the human body will denature in the body, which will lead to cancer.