Hi to all e-cig users there is now scientific evidence that e-cigs with and without nicotine are carcinogenic.
An an article just published titled
Electronic cigarettes induce DNA strand breaks and cell deathindependently of nicotine in cell lines
this shows that there is a significant cancer risk from the use of e-cigs and might be as much as smoking real cigarettes.
more research will follow in the next few years so that the relative risks can be quantified but as this is the season for giving up smoking please do not be fooled into claims that e-cigs are safe. They are a useful adjunct to giving up but must only be seen as that. Vaping without nicotine is carcinogenic and NOT SAFE.