PG vs. VG: What's the Difference? Propylene glycol, a component of electronic cigarette liquid, damages epithelial cells in human small airways Respiratory Research Springer Nature Link Vaping 101: What is E Juice and How is it Made? A Guide to PG VG Ratios in Vaping Juicemate DIY PGVG base 1 in 3 teens who vape say they get e cigarettes online, including through social media apps. (PMC study) Parents: Monitor online activity, start the conversation, and stay informed. Learn more at
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