Spearmint Nic Salt E Liquid by Jucce Ice How Many Chemicals Are in Vape Juice? A Look at Vape Juice Ingredients eJuiceDB DYK? Vaping coats lungs with potentially harmful chemicals. This can include chemicals such as: Diacetyl: This food additive, used to deepen e cigarette flavors, is known to damage small passageways in the lungs. Harmful Chemicals in Vapes and E Liquids You Should Avoid SMOKO E Cigarettes