I was vaping mostly juices from FSUSA (mostly PG, 70/30, 80/20, and some of their specialty juices at 50/50) and Pure Smoker (70/30). Scary thing is I HAD been vaping them for well over a year when I FINALLY realized that some of the really weird symptoms I'd been having for a year or more were because of the PG. It doesn't have to be blatant. My symptoms (great skin started to get worse and worse.. at age 36! Super super thirsty ALL THE TIME) were not something that hit me over the head, and I attributed them to my fibromyalgia. Finally, woke up, realized it was pg, found Virgin Vapor, who does awesome organic really nice thin 100% VG juices.... everything bad went away. Good luck, btw!