Red fennel is also called red scallop. Because it turns bright red when cooked, many people think it can replenish blood, so it is also called blood lettuce. Red cabbage contains pyrrolizidine alkaloids, some of which are potentially hepatotoxic. Eat as little as possible. They have been shown to be carcinogenic in animals.

There is something that is eaten as a snack in Hunan, both men and women, and even some children like to eat it, and that is betel nut. However, few people know that chewing betel nut for a long time may cause teeth to wear, shake, and turn black. In severe cases, it may even cause symptoms such as gum recession, periodontal disease, and oral mucosa leukoplakia. It may even lead to the birth of oral cancer. According to relevant reliable surveys, 80% of oral cancer patients have the habit of chewing betel nut for a long time.

Aflatoxin is stable and insoluble in water. It decomposes at a high temperature of 268°C. The boiling water in daily life is also far lower than the aflatoxin removal temperature. Aflatoxins are everywhere, hidden in refrigerators, kitchens, and food. Studies have found that starch-rich foods, such as cereals, beans and nuts, are prone to produce aflatoxin or mold in humid, stuffy environments.