New study reveals the worst e cigarette flavor to inhale and it's a popular one Worst flavor I have ever had! : r Vaping 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. Queensland Health We said what we said. Vapes are filled with heaps of nasty chemicals that can be harmful to your short and long term health. They can Instagram 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. Sweet E cigarette Flavored Liquids Could Increase Your Tooth Decay Risk