Vapes can contain harmful chemicals, such as diacetyl and heavy metals. They just don't put it on the pack. Do you know what you're vaping? Get the facts at nt.gov.au vaping Cancer Council Vapor Hiding Dangerous Ingredients: E Cigarette Concoctions Are Far from Safe American Lung Association Community Request Diacetyl Center for Research on Ingredient Safety Can You Use Any E Liquid in Any Vape? Compatibility Guide A Kernel of Truth: Diacetyl, Popcorn Lung and E Liquids Dinner Lady