Harmful First of all, it contains a large number of three tetrapropylpyridines (three of which are the most common carcinogens). Secondly, it will lead to carbonization and degeneration of protein (increasing the burden on kidneys and liver). Secondly, barbecue food is smoked with wood and coal as fuel. During the smoking process, the fuel will release a toxic substance called benzopyrene, which will pollute the smoked food. Benzopyrene is a representative of polycyclic aromatic hydrocarbons and a known strong carcinogen. When it enters the human body, it will change the molecular structure of nuclear deoxynucleic acid, which will lead to cancer. It is reported that 0.454 kg of baked goods contain more than 300 cigarettes. According to domestic statistics, the content of 3,4-benzopyrene per kilogram of kebabs is as high as 4 micrograms, while the international standard for barbecue food is not more than 1 microgram. If you eat too much, you will get cancer, or eat less. For your health. . . . .