Juul: FDA reverses order taking vaping products off the market in US, opens door to possible authorization ABC7 New York Juul Flavor Pods Ban Vaping Ban A joke, says Expert Geek Bar Pulse Vapes 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.