Many elderly people seldom eat vegetables overnight. They have been frugal all their lives. Sometimes they cook too many vegetables. If they can't finish a meal, they will choose to put it in the refrigerator and eat it the next day. But they don't know that eating too much overnight vegetables is bad for their health, because vegetables contain a lot of nitrate, which will produce carcinogen nitrite after a few hours. It is conceivable that if you often eat overnight dishes, it will definitely cause certain harm to the human body and may also cause cancer. Therefore, when cooking green leafy vegetables, be careful not to fry too much at once. It's better for health to fry and eat now. Thrift is a virtue, but it should not be based on health.
Eat less salted and smoked food. Food is preserved with a lot of salt, and a lot of nitrite will be produced in this process. As we all know, nitrite is a recognized carcinogen, so eat less pickled food. Some people smoke food. For example, during the Chinese New Year, many places like smoked bacon. In fact, in the process of food smoking, polycyclic aromatic hydrocarbons will also be produced. But bacon is delicious, as long as you don't eat too much.
Don't eat moldy food. Many families will store peanuts, corn, nuts, soybeans and other foods for a long time. Some of them are not well dried and preserved during storage, which leads to moldy food. Moldy food contains a lot of aflatoxin, which is the strongest carcinogen. In recent years, food safety has attracted people's attention. Some time ago, a bowl of sour soup killed a family of nine, which was enough to bring the highest vigilance to the world. So, don't eat overnight dishes and moldy food, and at the same time, eat less fried and smoked food.