Vapes Kick It California Banned Dangerous Vape Ingredients to Avoid in Your Vape Juice What Are the Ingredients in Vape Liquids? Vaped Going completely smoke free is difficult for many, but did you know that nicotine has been found in e cigarette liquids claiming to be 'nicotine free?' While e cigarettes don't contain tobacco, they may still Vape Juice Ingredients Explained: What's Really in Your E Liquid? Ecigator 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.