1. It is not good for the teeth themselves: chewing betel nut for a long time will cause serious tooth wear, leading to red and black teeth and even premature tooth loss.

Bad for periodontal: betel nut juice mixed with lime is easy to form dental calculus, which not only affects aesthetics, but also affects periodontal health. Areca nut fiber is thick and hard, and it may also stab the gums or block the teeth, causing the gums to be compressed and inflamed.

3. Not good for oral mucosa: it may cause mucosal lesions, but it may evolve into oral cancer.

4. Effect on digestive system: Some components of betel nut will damage taste nerve and saliva secretion, and affect digestive function. In addition, areca nut residue also stimulates the stomach wall, which can seriously lead to inflammation and even perforation of gastric mucosa.

/iknow-pic.cdn.bcebos.com/ 10dfa9ec8a 1363277b03f3e79f8fa0ec09fac773"target="_blank"title=""class="ikqb_img_alink"> /iknow-pic.cdn.bcebos.com/ 10dfa9ec8a 1363277b03f3e79f8fa0ec09fac773? x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_ 1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="/ 10dfa9ec8a 1363277b03f3e79f8fa0ec09fac773"/>

Extended data:

Chewing betel nut often, in addition to seriously damaging teeth, causing teeth to turn red and black, or even fall off early, there is a high risk of cancer. As early as 2003, the International Center for Research on Cancer under the World Health Organization had identified betel nut as a first-class carcinogen.

Many active components and metabolites in areca catechu are cytotoxic, genotoxic and even directly carcinogenic. These substances include areca catechu alkaloids, areca catechu tannins, areca catechu-specific nitrosamines and reactive oxygen species. The United States and Japan have experimented with betel nut extract and found that it can cause cancer in rats.

/baike.baidu.com/item/%E6%A7%9F%E6%A6%94/584 134? Fr = Aladdin # 8 "target =" _ blank "title =" Baidu Encyclopedia-Areca "> Baidu encyclopedia-betel nut