Propylene Glycol and Vegetable Glycerin 2 Pack: one PG and one VG, 500 mL (1.06 Pint) Each with Dispensing Caps; USP, Food Grade, Kosher: Amazon.com: Industrial & Scientific 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 E cigarettes can emit formaldehyde at high levels under conditions that have been reported to be non averse to users Scientific Reports Do Vapes Have Sugar? The Truth About Sweeteners and Vaping 1,2 Propylene Glycol: A Biomarker of Exposure Specific to e Cigarette Consumption