PG is found in a lot of the foods etc that you already consume and studies have been done on breathing in PG one of them can be found
here. When in doubt ask your doctor and explain what you plan on using and get feed back from them. So far on this board I have not seen anyone say that their doctor was anti
ecig most just don't know about it print out the information and take it in.
My doctor was all for me quitting smoking and understood that I was not ready to give up the nicotine yet. We had discussed it during earlier visits that it might not be a good time for me to quit smoking but she was really fascinated by the ecig and took all the information that I gave her on it.