Buying an e-cig for yourself or people you know who smoke are possibly the single cheapest intervention for adding years to life. E-cigs have very high success rates in getting people to quit smoking and are absurdly cheap. You can spend under $10 and add 14 years to someone’s life. I buy them just to give away.

I have bought such an e-cig and gave it to a friend. It was received positively. It also prompted a discussion about the (unknown?) effects of e-cigs. Even though this was only cited as an often given counter-argument I nontheless wonder what the research behind e-cigs shows? Can you provide references that back your claim of getting people to quit?