There has been a lot of seemingly bad press lately about electronic cigarettes but it's all about lost tax revenues from all those who have kicked the tobacco habit. 

There are actually just three or four ingredients in e-cig fluids.

PG - Propylene Glycol. Propylene Glycol is a form of mineral oil, an alcohol produced by fermentation of yeast and carbohydrates. This gives it the designation of carbohydrate when used in foods. Government agencies involved have deemed it safe: The FDA includes Pharmaceutical grade PG on its Generally Recognized As Safe (GRAS) list. The World Health Organization also considers it as safe for use.

VG - Vegetable Glycerin.  Vegetable glycerin is also known as vegetable glycerol. It is a carbohydrate that is usually derived from plant oils. It is used as a sweetener and as an ingredient in a number of cosmetic products. Vegetable glycerin is also used in place of alcohol to extract botanicals. Most Vegetable glycerin comes from coconut oil.

Flavoring - Artificial or natural food flavorings.

Nicotine -  While nicotine is addictive it is not a carcinogen meaning cancer causing. E- Cigarettes can contain nicotine if the user chooses but can also be nicotine free.

While it's true that it's probably best if one didn't have any bad habits, smoking tobacco vs e-cigs is no contest.

Vape On.