Harmful Chemicals in Vapes and E Liquids You Should Avoid SMOKO E Cigarettes Former Juul exec alleges company shipped tainted products Disposable vapes might look harmless with their fun colors and sweet flavors, but scientists have just uncovered a disturbing truth: these devices can pack a toxic punch even stronger than regular cigarettes. Bans on Flavored Vapes Have Pros And Cons, Study Finds Vaping releases toxic chemicals, including heavy metals, as well as ultrafine particles that go deep into the lungs. These increase the risk of heart and lung disorders.