1. Coal baking produces toxins: The doctor said that sweet potato baked on the street was made from burning coal. The baking process was not only contaminated by the toxic substances in the burning coal, but it was put on the stove after baking and there was no dust and sanitation facilities. Contamination of various factors. When coal is burned, it will produce a large amount of sulfur dioxide and carbon dioxide, but also produce a variety of harmful substances, and some coal also contains radioactive substances and arsenic and other toxic and harmful substances. People who eat these roasted sweet potatoes can cause chronic arsenic poisoning, and severe cases can damage the digestive and respiratory systems. 2. Chemical barrels change sweet potato furnace: As most of the barrels of sweet potatoes baked by the traders are barrels containing chemical raw materials, some of these scrap barrels are gasoline cans and diesel drums, and some are chemical raw material barrels. Chemical materials remain in the barrels. Many chemical raw materials contain ingredients that may harm human health. After the roasted sweet potatoes pass the high temperature, the harmful gases are adsorbed on the sweet potatoes. If these chemical products contain benzene, they will cause harm to the human respiratory and nervous system. After eating, there will be headache and dizziness. Even if the oil was previously loaded, these barrels cannot be protected because they have not been thoroughly sanitized. 3. Black Spotted Sweet Potatoes Poisoned: In particular, it is necessary to remind roasted sweet potato enthusiasts that hawkers generally combine sweet potatoes contaminated with Alternaria purpurea with good sweet potatoes. In the baked sweet potatoes, the relatively obvious dark spots have been difficult to discern. Experts said that the brown and dark brown spots of the sweet potato skin are infected by the "black spot pathogen". The toxins emitted by the black spot pathogens contain sweet potato ketone and sweet potato keto alcohol. This toxin will make raw sweet potatoes hard and fat. Bitter, boiled, steamed, or broiled with fire, etc. cannot be killed and is harmful to the liver after entering the body. Patients who suffer from acute poisoning due to eating dark spotted sweet potato will have symptoms such as vomiting and diarrhea. Severe persons may develop high fever, wheezing, convulsions, vomiting blood, coma, and even death. If poisoning is found, it should induce vomiting, catharsis, and emergency hospital treatment. Fresh Bay Leaves,Dried Bay Leaves,The Bay Leaf,Bay Leaf Powder jiangmen city hongsing food co., ltd. , https://www.jmhongsing.com