Betel nut is non-toxic, but it causes cancer.

Areca catechu has been proved as a first-class carcinogen by the International Agency for Research on Cancer. Areca catechu contains a lot of arecolin and alkaloids, which are cytotoxic. The reaction between oral mucosa and alkaloids contained in Areca catechu will lead to oral mucosal fibrosis. If people chew Areca catechu, smoke and drink alcohol at the same time, the chances of oral cancer will increase greatly.

Areca catechu is not only a first-class carcinogen, but also a serious tooth wear caused by long-term chewing. Experts have proved that excessive arecoline causes salivation, vomiting, diuresis, lethargy and convulsion.

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