Children are not allowed to eat betel nut, betel nut has been recognized as a class I carcinogen, children consume betel nut has many adverse effects. 1. Betel nut is hard, children’s mouth and teeth are not fully developed, eating betel nut is easy to wear teeth, destroy the oral mucosa, and betel nut contains betel nut alkali, long-term consumption of betel nut can easily lead to oral fibrosis, resulting in oral cancer, so children can not eat betel nut. 2. Betel nut also has a certain amount of ephedrine, ephedrine can stimulate the brain nerves, make the human body feel excited, resulting in human addiction, and affect the normal development of children’s brains, affecting the intelligence of children, so children can not eat betel nut.