How bad is vaping for your health? We're finally getting answers New Scientist New study reveals the worst e cigarette flavor to inhale and it's a popular one 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 The 4 'most deadly' vaping flavours revealed as smokers urged to switch 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.