But, I have to use moister tobacco with Premier and Rave FF tubes
CDC: E-Cigarettes (Vapes) Center for Disease Control webpage with information about vaping and its health impact
However, its important to note that it still contains nicotine, which is addictive

Behavioral Changes Big shifts in personality or mood Being secretive about where they go or who theyre with Getting defensive over small questions Losing interest in hobbies or things they used to care about Trouble at work or school Unusual sleep patterns or eating habits that go beyond the typical changes in adolescence Physical Signs Red or bloodshot eyes, or pupils that seem unusually large or small Frequent nosebleeds or a constantly runny nose (without being sick) Poor hygiene or changes in grooming Unexplained injuries, bruises, or marks Shaky hands, slurred speech, or other changes in coordination A persistent cough or raspy voice Social and Financial Signs Hanging out with a new crowd they wont talk about Missing money or valuables Financial struggles or suddenly asking for money Pulling away from close friends or family Legal trouble or risky decisions No single sign means something is definitely wrong

et al (2007) Flavonoids in Food and Wine, Proceedings of the 1st International Symposium on Human Health Effects of Fruits and Vegetables, Acta Horticulturae, Issue 744, Pages 107-116