Vape Juice Ingredients Explained: What's Really in Your E Liquid? Ecigator Do you know what's in a vape? Banned Dangerous Vape Ingredients to Avoid in Your Vape Juice What Are the Ingredients in Vape Juice? High Levels of Fruit flavored Chemicals in E cigarette Liquids 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.