National Vapers Club - Meeting Place for lovers of e-cigarettes, personal vaporizers and all things "fog" producing! for the main body of eliquid, if you use pg, it's deemed safe enough to pump into hospitals and clubs (in smoke machines) so from that aspect, you're fine.
Nicotine? If you're a smoker you've been inhaling it for years, along with too many chemicals to mention.
Electronic cigarette - Wikipedia, the free encyclopedia <- links to other recent studies in the ecig wiki.
The only real unknown is the flavouring.
It's a little ironic that smokers who willingly inhaled 5k+ chemicals daily question the health and safety aspect of ecigs. Swapping 5k chemicals known to be terrible for you for pg/vg/pga, some nicotine and some flavouring (flavouring is optional). Even if the flavourings pose a risk, they're being inhaled in such low quantities, the risk compared to smoking is near 0.
Here's a quote from flavourart on liberty-flights:
"So this should clear the fact that diacetyl is normally consumed when people eat butter, drink beer or wine, eat a fruit and its moderate consumption is harmless. However we realize that for E smokers, flavourart food flavors are used in a different way as they are not ingested but inhaled, and the presence of diacetyl can be a cause of concern. So we are pleased to inform our customers, which flavours contain diacetyl and related amount in %. Just consider that the amount shown is related to 100% flavor, so when used in finished product its content is less.
For example, butter flavor dosed at 0.3% in E juice. The amount of diacetyl in 100 ml of E.juice is 0.0045 grams. Assuming that a typical E cigarette contains an average of 2 ml of E juice, the amount of diacetyl assumed in a smoking session is...... 0.00009 grams or 0,09 ppm (part per million)."
Diacetyl is linked with "popcorn lung" from people standing over popcorn machines all day or working in factories with diacetyl in use without proper ventilation.
No carcinogens in ecigs, no tar, nameable substances in them and controllable by you. The only risk I can see is in flavouring, and using flavouring is optional if it's a concern.
Hope that gives you some answers.
