Vape Juice Ingredients: All You Need to Know What Actually Goes Into E Liquid? Breaking Down the Ingredients Vapeology 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 Are the Ingredients in Vape Juice? This is what you're actually inhaling when you vape. (Hint: It's not water vapor.) Nicotine Vapes: the Chemicals They Contain, What They Can Do to You Business Insider