are vapes considered smokeless tobacco βDYKβ π΅174,000+ Louisiana youth currently use products. π΅Research shows that most young people who vape do not know that e-cigarettes contain nicotine, instead thinking it is harmless water vapor. π΅Most adults Vaping - A Growing Concern
Description
Nicotine and tar are the main cause of tooth discoloration associated with smoking
Those numbers matter because they answer the basic question clearly

Both qualitative and quantitative methods were utilized to collect and evaluate data

Sources: University of Michigan, Environmental Health Perspectives .
the latter being the more popular choice as the former still involve smoking tobacco