Several friends of mine were recently diagnosed with oral cancer. Back in the day, not all that long ago, my friends use to gargle with Listerene mouthwash practically more times a day than eating three sit down meals a day (or more). Same for brushing their teeth. Of course, back then, we didn't have too many brands of tooth paste to choose from. I remember the standard types by Colgate or Crest or new dazzling brands of Close-up or Ultrabrite.
Anyway, it turns out that what we put in our mouth can be dangerous, if not slowly fatal.
So...., I've been reading medical journal articles on cancer causing agents in toothpaste and mouthwash.
I am primarily reading articles about scientific findings concerning Oral Oncology from the website link, below:
http://www.sciencedirect.com/science/journal/13688375