Juul news: Vape brand can continue selling its tobacco, menthol flavors of e cigarettes, FDA says ABC7 New York Juul Sales Recovered Within Weeks of Self imposed Flavor Ban Respiratory Therapy 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 Halts Online Sales of Some Flavored E Cigarettes WSJ