Is the food directly smoked from coal poisonous?

If it's not safe, use honeycomb coal, really. Eat less, whether it is toxic or not depends on the amount. If it's not good, eat less or not. Starch food, together with oil, will produce carcinogens at high temperature, but considering that it is baked wheat cake, it has less oil and less harm, but it is best not to eat it. For example, like potato chips, you should eat less or not. When starch is fried, it will produce a carcinogen, 3,4-benzopyrene. Pay attention. The black smoke of some cigarettes contains this substance.