Well, here's a little story for you and you can draw your own conclusions or do your own research.
My friend had autoimmune hepatitis several years ago. He survived a bout with liver cancer, and since then had made many changes to his lifestyle and diet. He was, however, still smoking cigarettes (though he was not a heavy smoker). Anyway, last spring I introduced him to e-cigs and he took right to them and has been using them since, and has not had a cigarette in over 8 months. Unfortunately, he began having issues with his liver recently. He went for testing and it turns out he has scar tissue on the liver and cirrhosis (non-alcholic). Being the fighter he is, he has decided to go for natural forms of treatment, for example eating nothing but fresh fruits and vegetables and very little meat, ridding his environment of toxins, etc. Upon reading the Ezra Protocol (a regimen designed to help those with cirrhosis stop it in its tracks and hopefully avoid needing a transplant), he discovered it specifically mentions avoiding Propylene Glycol.
Now...I am no chemist/scientist and neither is he. Both of us did what research we could on PG before we embraced vaping and found no major red flags, but...was it meant to be vaped on a daily basis? You know, I don't know. Is the jury still out on that one? I do know that I had to switch to VG because since I started vaping PG I developed wicked acne that would not abate. My friend is also now switching to VG. I've tried a few vendors that sell 100% VG and am especially interested in Velvet Vapors since they offer Organic VG.
All I know is I feel vaping is less dangerous than smoking cigarettes. But...I feel better vaping VG instead of PG. Maybe I am paranoid but vaping PG e-juices that come from China in a non-regulated industry worries me...just a little bit. And maybe a little more since it is mentioned in the Ezra protocol (something about the way the liver recognizes it, as a toxin, thereby causing an autoimmune response).
