Unlike 'analog' cigarettes we know what’s in e-liquid and the vapor that's produced. There are commonly about 4 ingredients in the liquid bottle you purchase. They’re Vegetable Glycerine (VG), Propylene Glycol (PG), food grade flavoring, and negligible nicotine if you choose. As for cigarette smoke, it contains more than 4,000 chemicals, many known carcinogens, such as formaldehyde, ammonia, and arsenic. Secondhand smoke is known to cause heart attacks, increase the risk of lung cancer, and cause birth defects. The ingredients in the e-juice have all been proven safe. For example, Propylene Glycol (PG) is used in fog machines to produce vapor at concerts and events.
Contrary to what has been reported in the media, there’ve been numerous studies done on vaping that shows it to be a better alternative to traditional smoking. A January 2014 article by Drexel University Professor Igor Burstyn, titled Peering Through The Mist, concludes in part there’s no evidence that vaping produces inhalable exposures to contaminants of the aerosol that would warrant health concerns by the standards that’re used to ensure safety of workplaces. Study after study has shown that there’s no evidence that secondhand vapor has any negative health effects. The mist exhaled from vaping contains none of the contaminants found in secondhand cigarette smoke, in fact, it’s not smoke at all, becoming invisible in a few seconds. Except for the aroma from food grade flavoring used, vape mist isn’t detectable by smell.
The American Lung Association has stated a bunch of times that there’s no safe level of exposure to secondhand cigarette smoke. The numerous chemicals and toxins in secondhand smoke cause nearly 34,000 deaths from heart disease a year in the United States alone among non-smokers. Non-smokers exposed to secondhand smoke increase their chances of lung cancer by as much as 30%. The CDC reports 7,300 deaths from lung cancer among non-smokers in the United States each year. The adverse effects of secondhand cigarette smoke has been well researched and documented. Conversely, while vaping has been and continues to be well researched, the evidence suggests we don’t see the same negative effects with secondhand vapor.
While there are no safe levels of secondhand smoke, studies show that even at saturation, the mist from vaping has no detectable ill-effects. Vaping enthusiasts who’re ex-smokers report a high level of satisfaction.