PG and VG are two common base ingredients in e liquids for electronic cigarettes, playing crucial roles in various vaping products. Let's explain their meanings using simple and understandable Ge Gou Comparative study of lung toxicity of E cigarette ingredients to investigate E cigarette or vaping product associated lung injury ScienceDirect PG vs. VG: What's the Difference? What Is Monopropylene Glycol Used For? The Chemistry Blog Propylene glycol in e cigarettes might keep us healthy, says researchers