Don't do it, man. DON'T DO IT! I still have PTSD from my bacon E-juice experience. Please allow me to summarize: It is not bacon. It has never been bacon and I doubt that it ever had aspirations to be bacon. I am certain that the flavouring was created by someone who had lived most of their life in a very remote part of the world, who had once seen a wild pig and understood that apparently there were people who ate them, possibly even with the unfertilized ova of poultry, so when tasked to make a juice that tasted like bacon, he wandered the streets until he found a live pig, gnawed a little on its hindquarters, pondered deeply the contents and aroma of the trough from which the pig ate, and then made a flavouring based on his observations -- once his jaw healed from the righteous kick the pig gave him for trying to chew on it.
Now, it may well be that somewhere out there is the best kept secret of bacon juice that actually tastes like fried strips of smoky pork, but it seems as though the chances of finding this mythical "real bacon" juice are quite slim, and as good as bacon is, that is one destination whose journey is not worth embarking upon, for the way is paved with bile.