Καλησπερα σας...διαβαζα μια ιατρικη ερευνα και ηθελα να σας την δειξω
Kamal Chaouachi, Tobacco researcher and consultant
Paris and Middle East
« Vaporising nicotine and other chemicals into an inhalable vapour » [1] is nothing new. This is actually what the harm reduction Eclipse cigarette (RJ Reynolds) and the modern hookah (shisha, narghile) are doing. Indeed, their principle is the same [2-4]. In these conditions, we may assume that the Chinese E-cigarette companies drew their inspiration from the growing world popularity of hookah smoking.
However, the main humectant in Eclipse and shisha is not propylene glycol as with E-cigarettes but glycerol. In both cases, tobacco or the
flavoured tobacco-molasses mixture, is heated and not burnt as in regular cigarettes [4].
Researchers early noted that glycerol is harmless, easily absorbed, and metabolised as a source of energy 
[3].
REFERENCES :
[1] Flouris AD, Oikonomou DN. Electronic cigarettes: miracle or menace ? BMJ. 2010 Jan 19;340:c311. doi: 10.1136/bmj.c311.
[2] Eclipse Expert Panel. A safer cigarette? A comparative study. A consensus report. Inhal. Toxicol. 2000;12:1–58.
[3] Sutherland G, Russell MA, Stapleton JA, Feyerabend C. Glycerol particle cigarettes: a less harmful option for chronic smokers. Thorax 1993;48:385–387.
[4] Chaouachi K. Hookah (Shisha, Narghile) Smoking and Environmental Tobacco Smoke (ETS). A Critical Review of the Relevant Literature and the Public Health Consequences. Int. J. Environ. Res. Public Health 2009; 6(2):798-843. doi:10.3390/ijerph6020798
Για οσους δεν ξερουν καλα αγγλικα λεει πως η γλυκερινη ειναι ακινδυνη,απποροφαται ευκολα απο τον οργανισμου και μεταβολίζεται ως πηγή ενέργειας