When you vape, you can breathe in the same harmful chemicals like in weedkiller. They just don't put it on the pack. Get the facts at health.tas.gov.au vaping Woraus Besteht Vape Liquid Vape Juice Ingredients: What's Inside Your E Liquid? VITAE Glass 8 Vape Juice Ingredients to Avoid Toxic e Liquid Flavors 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.