Vaping teens at risk of toxic metal exposure 'linked to brain damage' worst offending flavours revealed New study reveals the worst e cigarette flavor to inhale and it's a popular one This is the worst e cigarette flavor to inhale, scientists warn Dank Vapes, TKO and Other THC Vaping Brands Are Linked to Illnesses, C.D.C. Says The New York Times Vaping is on the rise. While e cigarettes don't contain tobacco, they may still contain many of the same toxic and cancer causing chemicals found in regular cigarettes. This includes: Acrolein (weed Do You Still Vape? What's The Worst Flavor For Your Lungs KJ103