High Power Box Mod: Limitless Power, Custom Style Lost Vape 8 Vape Juice Ingredients to Avoid Toxic e Liquid Flavors E Liquid Ingredients] What Is Vape Juice Made Of? Grey Haze UK Nicotine, propylene glycol, sweet flavorings, and various toxic chemicals like carcinogens and heavy metals are found in vape juice, posing health risks, especially to youth. 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.