Teen Health Info : Vaping everything you need to know Chemical characterisation of the vapour emitted by an e cigarette using a ceramic wick based technology Scientific Reports The Chemistry of Vaping ChemistryViews What's in an e liquid or vape juice? The main ingredients are propylene glycol (PG) and vegetable glycerine (VG). These are solvents that are basically used to dissolve and carry the other ingredients. Vape Juice Brands to Avoid (Harmful Ingredients) Vape Superstore Vape Flavors and Vape Juice: What You Need to Know Johns Hopkins Medicine