Cooking oil after repeated frying should not be consumed for this reason. Nowadays, many people are very concerned about the safety of the food they eat. And now a lot of food is fried food, and with the oil will not often change, always use the oil fried will produce a lot of carcinogens. After repeated heating, the oil will change color and become a darker oil. And this oil is not the same as the cooking oil we eat in the heating process will produce a series of chemical reactions? And it is very unfavorable to our body after eating it. After frying food in a large amount of oil, many merchants will put the leftover oil aside and continue to use it at the next time. Although it seems to be a very economical behavior, but from the point of view of some food safety issues, this kind of cooking oil after repeated heating is not recommended. Eat. The process of repeated heating not only destroys the nutrients in it, but also produces a lot of unhealthy substances for our body. Unhealthy substances. When eating too much of these food oils, it will make us have some poisonous manifestations. We usually cook as long as the oil fried twice, I here suggest that we do not use again, because it will produce some chemical reactions in the heating process, some of the substances produced on our body is very great, but the nutrition in the fat we can not absorb. If you eat out, generally do not eat fried food, because restaurants are generally to save costs, the oil will not often change. So to avoid the emergence of this problem, the above is the advice of the editor, we should pay attention to it in ordinary times. This is very unfavorable to our health. This is why the cooking oil can not be eaten after repeated frying, we must pay attention to this problem, or else harmed or our own. The usual diet must eat a little lighter, eat more vegetables and fruits.