Betel nut is non-toxic, but carcinogenic.

Betel nut has been proved to be a carcinogen by the International Agency for Research on Cancer (IARC). Betel nut contains a lot of betel nut and alkaloids, which are cytotoxic, and the reaction of oral mucosa and alkaloids contained in betel nut will lead to fibrosis of oral mucosa, and the chances of developing oral cancer will increase if you chew betel nut, smoke and drink alcohol at the same time.

Betel nut is not only a primary carcinogen, but also a serious wear and tear on the teeth. It has been proved by experts that excessive betel nut alkali causes salivation, vomiting, diuresis, lethargy and convulsions.

/iknow-pic.cdn.bcebos.com/730e0cf3d7ca7bcbfc2fcc5fb0096b63f624a86e "target="_blank "title=""class="ikqb_img_alink">/iknow- pic.cdn.bcebos.com/730e0cf3d7ca7bcbfc2fcc5fb0096b63f624a86e?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%% 2Fquality%2Cq_lfit%2Cw_600%2Ch_800%2Climit_1% 2Fquality%2Cq_lfit%2Cw_600%2Ch_800%2Climit_1 2Fquality%2Cq_85%2Fformat%2Cf_auto "esrc="/n1/2019/0228/c14739-30906889.html "target="_blank "title="People's Daily Online - Long-term betel nut chewing poses cancer risks"> People's Daily Online - Long-term betel nut chewing poses cancer risk