What substance does the red saliva spit by people who like eat areca contain?

Areca catechu is an important Chinese herbal medicine, and some ethnic minorities in the south still use the fruit as a chewing hobby, but it is a class 1 carcinogen in the list of carcinogens of the International Agency for Research on Cancer of the World Health Organization.

The medical community believes that chewing betel nut often will cause oral ulcer, gingival degeneration and submucosal fibrosis, and then lead to oral cancer. Medical research has found that chewing betel nut increases the risk of oral cancer by 8.4-9.9 times. Arecoline and arecoline in betel nut are potentially carcinogenic, and flowers and vines of betel nut contain carcinogens. The reason why eat areca can spit out this red saliva is mainly due to the fact that people will chew it together with the betel leaf and shell powder in eat areca, and these substances will react to form this red saliva. ?

Betel nut is crunchy when chewed, but after eating it, people will spit out a kind of red saliva. If you don't know, you must think there is something wrong with your body. In fact, the reason why eat areca can spit out this red saliva is mainly due to the fact that people will chew together with the roe and shell powder in eat areca, and these substances will react to form this red saliva. Moreover, this kind of saliva is particularly sticky, which not only affects the appearance when it sticks to the ground, but also is difficult to clean. The cleaners need a lot of effort to brush it off, so people are forbidden to eat areca on public occasions.

Betel nut can be said to be the most controversial fruit. Some people can't put it down, while others hate it. Some people can't put it down because it can make people feel refreshed when they were in eat areca. After eat areca, it is easy to make oral mucosa and even cancer. Many countries have banned eat areca, and some people have confirmed that it is because eat areca has oral cancer. Because of its great harm to health, many people hate betel nut.