It is inevitable that the food will burn and burn during the cooking process. For a slight burnt, many people choose to continue eating it, but if the whole food is browned and blackened, it is usually thrown away. However, some people prefer a crispy texture, such as a roasted sweet potato on the street or a slightly charred scone, which is crispy and delicious.
However, there is also a rumor circulating on the Internet that "burnt food cannot be eaten!".Can cause cancer!So what is the truth?
According to research, when food is heated to too high a temperature, the nutrients in it such as vitamin C, B vitamins and unsaturated fatty acids will be destroyed, and some harmful substances may be formed, including carcinogens.
At different temperatures, different carcinogens are produced. For example, when food is heated to 120, acrylamide (a group 2a carcinogen) is produced, especially foods that contain carbohydrates and amino acids, such as potatoes, bread, steamed buns, etc. Although acrylamide has a certain neurotoxic effect, as long as it is not consumed frequently, do not eat too much at a time, and pay attention to eating it with fresh vegetables and fruits, it is safe.
High-starch foods that have been fried or baked contain relatively higher levels of acrylamide, so if you are concerned about the intake of acrylamide from food sources, it is recommended to eat less potato chips, chips, toast, fried potatoes, etc.
When food is heated to 200, heterocyclic amines (class 1 carcinogens) may be produced, especially in protein-rich foods such as livestock and poultry meat and fish. Studies have found that heterocyclic amines are carcinogenic and mutagenic, and have been linked to a variety of cancers.
When the oil temperature exceeds 300, benzopyrene (a group 1 carcinogen) is formed, which is a strong carcinogen. The total amount of benzopyrene produced when the food is baked is much higher than when it is not burned. Long-term exposure to benzopyrene may be associated with a variety of cancers.
However, eating burnt food does not necessarily mean you will get cancer. The results of the experiment showed that the direct feeding of the charred black food to the hamsters could induce liver cancer, but if the burnt food was mixed into the feed and then fed to the hamsters, no cancer was found in the hamsters even for the whole life (the life span of hamsters is about 2 years).
Therefore, in the daily diet, following the principle of food variety, occasionally eating a little burnt food will not induce cancer. However, the nutrients in the burnt part are almost completely destroyed, and there is no health benefit. Therefore, we still have to try to eat less burnt food, or even avoid it.