there are chemicals in almost everything we consume. our food is loaded with things not good for us, unless you can afford to buy organic. as far as e-cigs from what I have researched they are safe, however there are not enough test to confirm. I treat mine like regular cig and go out side and keep away from others. the good news is I have cut my weekly cost from $35 a week on cigarettes to $6 a week on e-cigs. I feel better, breath better and have more energy. And I don't stink anymore.