I hate when doctors and dentists tell you how bad something is for you... when in truth, there have NOT been any significant studies on vaping and tooth health!! My dentist couldn't be happier that I stated vaping... In the past 18-months, I've had check-ups as good as when I was in my early teens (before I found chocolate, cola, and smoking). Tobacco stains teeth, as well as does damage to gums and tooth enamel. Vaping? Well, PG is a main component in mouthwash and toothpaste (as well as the majority of hygiene and medicinal products you use daily)... VG is a sweetener approved by the American Diabetes Association, as well as the American Dental Association because VG is less harmful to tooth enamel and gums (and does not affect blood-sugar levels in diabetics)... so... any dentist that tells you vaping is "bad on teeth" is fear-mongering at worst, or just horribly misinformed at best. An "educated professional" should never pass opinion or hear-say as fact...