1, if the meat is not fully cooked, there may be bacterial residues and parasites.

2. The food after barbecue is essentially hot. In addition, it is very easy to get angry by adding spices such as Chili and pepper during the barbecue. At the same time, it will stimulate the peristalsis of gastrointestinal tract and the secretion of digestive juice, thus damaging the mucosa of digestive tract and affecting the balance of physique.

3. Raw meat is easy to be polluted during storage and firing, and it is not easy for people to notice that the strong barbecue flavor changes in texture, which leads to harm to human body.

4, barbecue food is easy to cause cancer. Meat is directly barbecued at high temperature, and the decomposed oil contains benzoin, which is a strong carcinogen. The burnt meat on the surface of meat will produce hydrocarbon carcinogens. Long-term consumption, this carcinogen will accumulate in the body, which may induce gastric cancer, esophageal cancer and colon cancer.

5. The seasoning added when barbecuing food contains a lot of monosodium glutamate, which is harmful to human body after being barbecued to form sodium pyroglutamate.

6, affecting vision. Eating too much cooked and smoked protein food will be threatened by parasites and other diseases, which will seriously affect teenagers' eyesight and lead to myopia.

7. Eating barbecue food for a long time is more likely to get sick. Barbecue foods are high in fat and calories and are prone to hypertension, diabetes and cardiovascular diseases. And if women often eat this kind of meat food, it will increase the risk of ovarian cancer and breast cancer. The more times you eat, the higher the prevalence rate.