Do Juul Pods Have Diacetyl FDA warns Juul, says it marketed vapes as less harmful than Vapes are clouded in misconception . They contain many of the same toxic and cancer causing chemicals found in regular cigarettes. One of these ingredients is diacetyl, used in popcorn flavourings for its Is Diacetyl in Vapes? Crystal Vape & Crystal Bar & SKE Vape Official Station Vapes with Diacetyl List: Brands and Flavors to Avoid