Which brands contain diacetyl in their vape juices? Knowledge Kaiweili Digital Technology Do you really know what's in your vape? There's no safe vape. Besides nicotine, vapes contain many other harmful substances. Formaldehyde, arsenic and lead have all been found inside common vapes. Processed Food Flavoring Additive 'Diacetyl' also in Vape Chemical Free Life Risk assessment of inhaled diacetyl from electronic cigarette use among teens and adults ScienceDirect what is in vape juice