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. Juul Labs launches new Juul2 pod flavours Better Retailing When Will Juul Flavors Come Back Juul to Stop Selling Flavored E Cigarette Pods in Stores Typically, the nicotine laden pods used with Juul and other vape pens contain about the same amount of nicotine as a pack of cigarettes. And some youths are consuming a pod a day.