FDA orders Juul to stop selling e cigarette products Do Juul Pods Contain Formaldehyde What is a Juul? It's a trend parents need to know 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. Is Formaldehyde in Vapes? Do Juul Pods Contain Formaldehyde FDA rescinds marketing ban on Juul vaping products