Juul Lawsuit Update May 2026 Potential Juul ban will boost other vaping brands, retailers and customers say Iowa Capital Dispatch Do Juul Pods Have Diacetyl FDA warns Juul, says it marketed vapes as less harmful than 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.