How Each Component of Betel Quid Is Involved in Oral Carcinogenesis: Mutual Interactions and Synergistic Effects with Other Carcinogens—a Review Article

Purpose of Review The roles of the components of betel quid in oral carcinogenesis remain unclear. The purpose of the present review is to highlight the effect of each component of betel quid and to discuss the synergistic effects of other carcinogens along with betel quid in the development of oral cancer in habitual betel quid chewers.