Don's right Boo ... I'm 71, smoked since 5th grade. I haven't had a cigarette since last November, I am now hooked on elec cigs. I asked my doctor about it and he said that e-cigs are certainly much better than real cigs. He added that there has not been enough studies about what's in 'em so he hesitates to recommend them - generally. However, in my case he did notice a marked improvement in my lungs and told me he didn't see any reason for me to stop using the e-cigs ...
Ciao,
Jerry