Vaping is unregulated and unsafe get the facts DHW Voice Understanding E Cigarette Liquids: Key Ingredients Explained Vibe Medina What is vape juice? Freeman Vape If you vape, follow 5 simple tips to help avoid battery explosions and injury. https: www.fda.gov tobacco products products ingredients components tips help avoid vape battery explosions 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.